period over which

USAGE SUMMARY

The phrase "period over which" is correct and usable in written English.
It is typically used to describe a specific duration or timeframe during which an event or condition occurs. Example: "The study analyzed the data collected over a period over which the participants were monitored for six months."

✓ Grammatically correct

Science

News & Media

Formal & Business

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

Heins did not specify the time period over which the company might sell those devices.

The Guardian - Tech

It has not disclosed how many loans are affected, nor the period over which errors occurred.

The Guardian - Money

There is also the question of the appropriate time period over which to estimate revenue effects.

The New York Times

Fidelity's Income Replacement funds use target dates to determine the period over which the portfolio will be drawn down.

The New York Times

11.07am GMT The key issue, says Carney, is the time period over which inflation must return to the 2% target.

The Guardian - Business

I think for monetary policy you always have to be thinking about the time period over which policy works.

The Washington Post

The transition from quiet wakeful rest to sleep represents a period over which attention to the external environment fades.

Progress in Brain Research

A procedure is presented for determining the time period over which exposure may occur for a given level of risk.

Biosystems Engineering

The finance ministers also discussed possible concessions to extend the period over which Greece must repay its loans.

The New York Times

The customer defines the target amount to be reached and the period over which saving will take place.

The Economist

The period over which new cases occur can be a clue to the identification of the causative agent.

Encyclopedia Britannica

Expert writing Tips

Best practice

When using "period over which", ensure clarity by specifying the units of time (e.g., days, months, years) to provide context for the duration being discussed.

Common error

Avoid using "period over which" without clearly defining the start and end points. Be specific about the dates, events, or conditions that mark the beginning and end of the period.

Linguistic Context

The phrase "period over which" functions as a prepositional phrase modifying a noun or clause. It specifies the timeframe or duration related to a particular event, process, or observation, as demonstrated by Ludwig's examples.

Expression frequency: Very common

Frequent in

Science

48%

News & Media

35%

Formal & Business

10%

Less common in

Encyclopedias

2%

Reference

0%

Wiki

0%

Ludwig's WRAP-UP

In summary, the phrase "period over which" is a grammatically sound and frequently used prepositional phrase. According to Ludwig AI, the phrase is correct and usable in written English, serving to define a specific duration or timeframe within which an event or condition occurs. Common in scientific, news, and formal business contexts, it is considered to have a neutral register. While versatile, it's crucial to provide specific units of time to avoid vagueness and ensure clarity, as highlighted in the writing guidance. Ludwig's examples showcase the phrase's widespread application in diverse domains, reinforcing its importance in effective communication.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

time span during which

This alternative emphasizes the duration aspect, replacing "period" with "time span" for a slightly different nuance.

duration throughout which

Using "duration" instead of "period" highlights the length of time, while "throughout" replaces "over" to specify extent.

interval in which

Replaces "period" with "interval" indicating a specific segment of time, and "over which" with "in which" for conciseness.

timeframe throughout that

This alternative uses "timeframe" to specify a set duration, replacing "period" and using "that" instead of "which".

length of time during that

This option emphasizes the "length" aspect using "length of time" and replaces "over which" with "during that".

phase in which

The word "phase" replaces "period" indicating a stage in a process. This is most appropriate when "period" is used to mean "phase".

stretch of time wherein

This alternative replaces "period" with the less common "stretch of time", and "over which" with the formal "wherein".

window of opportunity when

Replacing "period" with "window of opportunity" implies a specific timeframe for action, and replaces "over which" with "when".

the course of

This alternative simplifies the structure, focusing on the "course" or progression of events rather than a defined period.

the span of time that

Highlights the "span" or extent of the duration, replacing "period" with "span of time" and "over which" with "that".

FAQs

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

You can use "period over which" to specify the duration of an event, activity, or observation. For example, "The study analyzed the data collected over a period over which the participants were monitored for six months."

What are some alternatives to "period over which"?

You can use alternatives such as "time span during which", "duration throughout which", or "interval in which" depending on the context.

Is it better to say "during which" or "period over which"?

While both are grammatically correct, "during which" is often more concise and suitable for shorter sentences. "Period over which" is useful when you want to emphasize the length or nature of the time frame involved.

What's the difference between "period over which" and "timeframe for"?

"Period over which" emphasizes the duration during which something occurs, while "timeframe for" focuses on the allotted time for a specific purpose or activity. The choice depends on whether you're highlighting the duration itself or the purpose of the time period.