Used and loved by millions
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
Substantial length of time
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "Substantial length of time" is correct and usable in written English.
It can be used to describe a significant duration or period of time that is noteworthy or considerable. Example: "The project was delayed due to unforeseen circumstances, resulting in a substantial length of time before completion."
✓ Grammatically correct
News & Media
Science
Academia
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
18 human-written examples
"I feel somewhat overwhelmed at the prospect of trying to talk for any substantial length of time about a lawsuit that isn't going anywhere," he explained.
Academia
Mr. Ozawa says he cannot walk for more than five minutes without having to sit down, and he cannot conduct standing for any substantial length of time.
News & Media
If Mr. Obuchi is incapacitated for any substantial length of time, pressures will rise within his Liberal Democratic Party to chose a new standard bearer before the October elections.
News & Media
They can talk this way because they have seldom had the nerve to expose themselves for any substantial length of time to the rigorous discipline of an organization whose principal task is not talk but action, not ideas but work.
News & Media
On Sunday, interviews with the police and with Mr. Tarloff's family and neighbors, offered a portrait of an increasingly troubled and depressed man whose actions were deemed serious enough to draw the attention of the authorities, but not grave enough to merit committing him to a psychiatric hospital for any substantial length of time.
News & Media
While it would take a substantial length of time to develop an entirely new missile, existing medium-range weapons in the US arsenal, such as sea-launched Tomahawk cruise missiles, could be adapted for ground launch more quickly, arms expert said.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
42 human-written examples
The pole-to-pole distance of the metaphase spindle is reasonably constant in a given cell type; in the case of vertebrate female oocytes, this steady-state length can be maintained for substantial lengths of time, during which time microtubules remain highly dynamic.
Science
Some phenotypes (e.g. morphological as opposed to behavioral) require substantial lengths of time to be expressed after their induction has been triggered [8], and an early warning is necessary well before the anticipated condition occurs to avoid this cost.
Science
The finding that BSA increased the formation of active dimers at times in which the reactivation of the control was at a constant level, prompted us to explore if BSA increases the formation of active dimers after the enzyme had been allowed to reactivate for substantial lengths of time.
Science
These results show that the H. lacusprofundi β-galactosidase enzyme is able to function for significant lengths of time even in the presence of substantial concentrations of organic solvent-water mixtures.
Science
These burn out after a few uses, so you need to weigh the cost of building a more substantial furnace with the length of time you hope to use it.
Wiki
Expert writing Tips
Best practice
When using "substantial length of time", ensure the context makes clear why the duration is significant. This can involve the impact of the duration or the activities undertaken during that period.
Common error
Avoid using "substantial length of time" when a shorter, more precise duration would suffice. Overusing the phrase can dilute its impact and make your writing sound less credible.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "substantial length of time" functions as an adverbial phrase, modifying verbs or clauses by indicating the duration of an action or state. It provides context regarding how long something lasts, adding detail and emphasis to the temporal aspect as Ludwig AI confirms.
Frequent in
News & Media
34%
Science
44%
Academia
6%
Less common in
Formal & Business
3%
Wiki
3%
Reference
0%
Ludwig's WRAP-UP
The phrase "substantial length of time" is a versatile and grammatically correct expression used to denote a significant duration. Ludwig AI confirms its usability across various contexts, from news and media to scientific research. Its frequency and presence in authoritative sources like The New York Times and The Guardian underscore its established place in the English language. When writing, remember to use the phrase judiciously, ensuring it adds meaningful emphasis to the duration being described and avoiding overstatement. Considering alternative phrases like "considerable duration" or "significant period" can also enhance the precision and impact of your writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
considerable duration
Emphasizes the extent or degree of the duration.
significant period
Highlights the importance or impact of the duration.
extended timeframe
Focuses on the boundaries within which events occur.
prolonged duration
Implies something lasting longer than expected or usual.
lengthy period
A more straightforward way to describe something lasting long.
appreciable time
Emphasizes that the amount of time is noticeable or worth considering.
extended period of time
More verbose, explicitly stating the concept of time.
notable duration
Highlights that the length of time is worth noting.
sizeable time frame
Similar to "extended timeframe" but might suggest a greater capacity for events.
protracted period
Implies the duration is drawn out, possibly to an undesirable extent.
FAQs
How can I use "substantial length of time" in a sentence?
You can use "substantial length of time" to describe a significant duration, as in, "The project was delayed for a "substantial length of time" due to unforeseen circumstances."
What can I say instead of "substantial length of time"?
You can use alternatives like "considerable duration", "significant period", or "extended timeframe" depending on the context.
Which is correct: "substantial length of time" or "substantially long time"?
"Substantial length of time" is the correct and more common phrasing. "Substantially long time" is less idiomatic.
What's the difference between "substantial length of time" and "considerable amount of time"?
While both phrases refer to a significant duration, ""substantial length of time"" directly emphasizes the duration itself, whereas "considerable amount of time" can also refer to the effort or resources expended during that period.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
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