period during which

USAGE SUMMARY

The phrase "period during which" is correct and usable in written English.
You can use it whenever you want to refer to a distinct span of time or section of time in a sentence. For example: "We had a two month period during which we were able to experiment with different techniques."

✓ Grammatically correct

News & Media

Academia

Science

Encyclopedias

Wiki

Human-verified examples from authoritative sources

Exact Expressions

58 human-written examples

The lockup period, during which insiders were barred from selling shares, ends today.

The New York Times

The typical period during which resale is prohibited, he said, is 10 years.

The New York Times

That was the period during which I introduced myself to scotch and whiskey.

The Guardian - Opinion

(They are also up for confirmation hearings, a period during which only fools talk policy).

The New York Times

What ensued were terrible times – euphemistically called the Special Period – during which many Cubans went hungry.

The Guardian - Opinion

The request extends the waiting period during which federal regulators can review the transaction.

The New York Times

The lock-up period, during which insiders were barred from selling shares, ends today.

The New York Times

It began Gorky's celebrated "tramp period," during which he described the social dregs of Russia.

Britannica

The first 33 days served as a control period, during which no socialbots were deployed.

MIT Technology Review

Human-verified similar examples from authoritative sources

Similar Expressions

2 human-written examples

"We're looking at a period during which the climate changed quote a lot," she said.

Vice

— a brief period during which Jasper molested Oliver.

The New York Times

Expert writing Tips

Best practice

When using "period during which", ensure the noun it modifies is clearly defined to avoid ambiguity. For example, specify whether you are referring to a "historical period", "incubation period", or "waiting period".

Common error

Avoid using "period during which" in simple sentences where a more concise alternative like "when" or "while" would suffice. For example, instead of "the period during which he studied", consider "when he studied".

Linguistic Context

The phrase "period during which" functions as an adjectival phrase or a relative clause, modifying a noun by specifying a particular time frame. As Ludwig AI confirms, this phrase is grammatically sound and widely accepted.

Expression frequency: Very common

Frequent in

News & Media

42%

Academia

28%

Science

18%

Less common in

Encyclopedias

6%

Wiki

3%

Formal & Business

3%

Ludwig's WRAP-UP

In summary, the phrase "period during which" serves as a grammatically correct and common way to denote a specific timeframe in which an event or condition occurs. As confirmed by Ludwig AI, its versatility allows for usage across various contexts, ranging from formal academic writing to news reporting. While generally acceptable, avoiding overuse in simple sentences and ensuring the modified noun is well-defined contribute to clearer and more effective communication. This comprehensive analysis, supported by numerous examples and expert evaluation, provides a solid foundation for understanding and utilizing the phrase "period during which" effectively.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

timeframe in which

Uses "timeframe" instead of "period", offering a slightly more specific connotation of a defined duration.

phase in which

Substitutes "phase" for "period", implying a stage or segment of a process or cycle.

interval when

Replaces "period during which" with a more concise "interval when", focusing on the space between events.

the time that

A simplified rephrasing of the original phrase, suitable for less formal writing.

duration when

Uses "duration" instead of "period", highlighting the length of time.

the stage at which

Emphasizes a specific point or step within a sequence or process.

the span when

Focuses on the breadth or reach of the time involved.

moment that

Emphasizes a particular instance or point in time, rather than a longer stretch.

the season that

Refers to a specific recurring time of year.

the era when

Indicates a distinct historical period or epoch.

FAQs

How can I use "period during which" in a sentence?

The phrase "period during which" is used to specify a length of time when something occurs. For example: "The lock-up "period", during which insiders were barred from selling shares, ends today."

What can I say instead of "period during which"?

You can use alternatives like "timeframe in which", "phase in which", or "interval when" depending on the context.

Is it redundant to use "time period during which"?

Yes, using "time period during which" is generally considered redundant. The word "period" already implies a span of time, so "time period" is unnecessary. Instead use just "period during which".

What's the difference between "period during which" and "while"?

While both indicate concurrent events, "period during which" emphasizes a defined span of time, whereas "while" typically denotes actions happening simultaneously. For instance, "the period during which the experiment ran" specifies the experiment's duration, while "while the experiment ran" simply indicates concurrence.