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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
chiefly since
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "chiefly since" is correct and usable in written English.
It can be used to indicate that the primary reason for something is due to a specific factor or time period. Example: "The project was delayed chiefly since the team faced unexpected technical challenges."
✓ Grammatically correct
News & Media
Science
Encyclopedias
Alternative expressions(16)
mainly because
primarily due to
primarily because
largely due to
mostly as a result of
principally as a consequence of
primarily on account of
mainly attributable to
in large part because
to a great extent because
particularly since
specifically since
essentially since
notably since
predominantly since
especially since
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
2 human-written examples
Even the rapturous Summertime Clothes, perhaps the most accessible track in the group's oeuvre, chiefly since the words for once aren't buried in the mix, is anchored by a seething electronic riff.
News & Media
'He said something about how people who go to Glastonbury must be mad to sit in the mud for three days.' This, atypically, really bothers him, chiefly since he thinks the applause afforded Weller following his Eighties solo set at Glastonbury gave him the courage to disband the Style Council and, a few years later, begin anew.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
55 human-written examples
The bulk of the population derives its living from agriculture, chiefly stock raising, since only 15 percent of the land is cultivable.
Encyclopedias
Another important decision reached at this time was that the getaway would be made chiefly over water, since Gravesend Bay lay handy, only a block and a half from the Rubel substation.
News & Media
Such an idea has been acceptable to religious people (chiefly evangelical Protestants) since the model of an "intelligent designer" would fit perfectly with the image of their deity, giving a scientific sense to creationism.
Many lifespan-augmenting mutations have since been isolated, chiefly in C. elegans, but also in yeast, fruit flies and mice.
Science
"Polyphonia" shows, as most of Mr. Wheeldon's work has since, that he is chiefly interested in how women may be partnered by men.
News & Media
Over the past year profits rose to highs not seen since 2006, chiefly on the back of a rising stockmarket, a further decline in non-performing loans and strong overseas lending.
News & Media
Sarah McClendon, the tiny, klaxon-voiced White House reporter who covered, pestered, lectured and often infuriated presidents since Franklin D. Roosevelt, chiefly as the leader of her one-woman McClendon News Service, died today at the Veterans Affairs Medical Center here.
News & Media
In each step k of the Euclidean algorithm, the quotient qk and remainder rk are computed for a given pair of integers rk−2 and rk−1 : The computational expense per step is associated chiefly with finding qk, since the remainder rk can be calculated quickly from rk−2, rk−1, and qk : The computational expense of dividing h-bit numbers scales as O(h(ℓ+1)), where ℓ is the length of the quotient.
Wiki
Keeping all these women straight isn't crucial since they function chiefly as adornments of Shafak's magic realism, the inhabitants of a supernatural personal history.
News & Media
Expert writing Tips
Best practice
When using "chiefly since", ensure that the subsequent clause clearly explains the primary reason or cause being asserted. For example: "The project was delayed, chiefly since the team faced unforeseen technical challenges."
Common error
Avoid using "chiefly since" when the following clause offers only a secondary or minor reason. This phrase signals a primary cause, so ensure the reason you provide is, in fact, the most important one. Using it for a less significant reason weakens your argument.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
Chiefly since functions as a causal connector, linking a statement with its primary reason or cause. It indicates that the following clause is the main explanation for the preceding statement. Ludwig provides examples where "chiefly since" introduces the central reason behind a particular situation or outcome.
Frequent in
News & Media
33%
Science
33%
Encyclopedias
33%
Less common in
Formal & Business
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase “chiefly since” functions as a causal connector indicating the primary reason for a statement. As confirmed by Ludwig, its usage is grammatically correct, though less common than alternatives like "mainly because". It appears mainly in news, science, and encyclopedia contexts, suggesting a neutral to formal register. The best practice involves ensuring the clause following the phrase presents the primary cause, and it's essential to avoid using it for secondary or minor reasons to maintain clarity and argumentative strength.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
mainly because
Replaces "chiefly" with "mainly", offering a slightly less formal tone while retaining the core meaning of primary causation.
primarily because
Substitutes "chiefly" with "primarily", keeping a similar level of formality and emphasizing the main reason.
largely due to the fact that
Replaces "chiefly since" with a more verbose but equally valid construction, highlighting the significant impact of the stated reason.
mostly as a result of
Similar to "chiefly since" but uses "mostly" and "as a result of" to show a consequence relationship.
principally as a consequence of
A more formal alternative, replacing "chiefly" with "principally" and using "as a consequence of" to emphasize causation.
primarily on account of
Uses "on account of" to indicate the reason, maintaining a formal tone similar to "chiefly since".
mainly attributable to
Indicates the cause or reason for something, similar to "chiefly since", with a focus on attribution.
in large part because
Implies that the reason is significant but may not be the only one, offering a nuanced perspective on causation.
for the most part due to
Highlights the most substantial cause while allowing for the possibility of other contributing factors.
to a great extent because
Indicates a significant influence or reason, although not necessarily the exclusive one.
FAQs
What does "chiefly since" mean?
"Chiefly since" means primarily because or mainly because. It introduces the main reason or cause for something.
How can I use "chiefly since" in a sentence?
Use "chiefly since" to connect a statement with its primary reason. For example: "The event was successful, chiefly since the marketing campaign was well-executed."
What are some alternatives to "chiefly since"?
You can use alternatives like "mainly because", "primarily because", or "largely due to".
Is "chiefly since" formal or informal?
"Chiefly since" can be used in both formal and informal writing, but alternatives such as "mainly because" might be preferred in very informal contexts.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested