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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
during which
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "during which" is correct and usable in written English.
You can use it to refer to a specific period of time. For example, "She worked at the company for two years, during which she made great strides in her profession."
✓ Grammatically correct
News & Media
Science
Alternative expressions(20)
is equivalent to
in the wishes of
rapidly thereafter
for the immediate future
Very soon
somewhere later
one week before
at the early time
in the next weeks
during the previous years
it is important to remember
not yet completed
to avoid disruption
in accordance with direction from
a couple of books before
if not soon
as excellent as
to the fullest extent
in a flash
as instructed by the directive
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
60 human-written examples
(A pause, during which Freddy laughs loudly).
News & Media
during which Richard judges baseball to be better than cricket.
News & Media
A brief pause, during which I absorbed this exciting information.
News & Media
Years go by, during which she raises their son.
News & Media
European settlers & the Arabs during which 122 persons were killed.
News & Media
A waiting period ensued, during which objections could be raised.
News & Media
"They had around five minutes together during which they hugged".
News & Media
The hospital received a reprieve during which time the "Comm.
News & Media
— a brief period during which Jasper molested Oliver.
News & Media
The climb symbolized the protest during which it happened.
News & Media
The era during which your nation's main footballer is the same age as you, therefore, is the era during which you own your culture.
News & Media
Expert writing Tips
Best practice
Use "during which" to clearly link an event or action to a specific timeframe. It helps create a smooth flow in your writing by connecting clauses effectively.
Common error
Avoid using "during which" in very simple sentences where a simpler word like "while" or "as" would suffice. Overusing it can make your writing sound unnecessarily formal or convoluted.
Source & Trust
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "during which" functions as a relative adverb, introducing a relative clause that modifies a preceding noun phrase referring to a period of time. It specifies when an event or action occurred in relation to that time period, as shown in Ludwig's examples.
Frequent in
News & Media
50%
Science
25%
Wiki
10%
Less common in
Formal & Business
5%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "during which" is a versatile phrase used to connect events to a specific period, functioning as a relative adverb. According to Ludwig, it is grammatically correct and appears most frequently in news and scientific contexts, indicating a formal to neutral tone. For simpler sentences, consider using alternatives like "while" or "in which". Remember that "during which" is typically preceded by a comma, setting off a nonrestrictive clause. Keep in mind that you may encounter different use cases depending on the industry in which you're working.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
in which
Omits the word "during", making it a more concise option.
while
Represents a shorter, more direct way to indicate simultaneous events.
through which
Emphasizes a process or progression occurring across the time period.
throughout which
Highlights that the action spans the entirety of the specified period.
in the course of which
A more formal and elaborate way of saying "during which".
over which
Suggests examining a period of time.
at which time
Replaces "during which" with a more specific indication of time.
as
Provides a simple temporal conjunction to indicate when something happens.
for the duration of which
Highlights the continuous nature of an event within a specific timeframe.
while that happened
Uses a more conversational tone to indicate simultaneity.
FAQs
How can I use "during which" in a sentence?
Use "during which" to connect two clauses, indicating that one event occurred within the timeframe of another. For example, "The meeting lasted two hours, during which several key decisions were made."
What are some alternatives to "during which"?
Alternatives include "while", "in which", or "throughout which". The best choice depends on the specific context and desired level of formality.
Is it always necessary to use a comma before "during which"?
Yes, generally you should place a comma before "during which" when it introduces a nonrestrictive (or nonessential) clause. This means the clause provides extra information but isn't crucial to the sentence's core meaning.
What is the difference between "during which" and "when"?
"During which" is typically used to refer to a period of time, while "when" can refer to a specific moment or a general time. For example, "During the summer, we travel" versus "I'll call you when I arrive."
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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
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested