weeks' duration

USAGE SUMMARY

The phrase "weeks duration" is correct and usable in written English.
You can use it when you are referring to a length of time that is measured in weeks. For example: "The course is three weeks duration."

✓ Grammatically correct

Science

News & Media

Encyclopedias

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

Once I converted my dancing of three weeks' duration by a pocket ruler into three hundred seventy-two kilometres.

The New Yorker

Short dry spells of several weeks' duration may occur during the rainy season.

Encyclopedia Britannica

52 year old woman addicted to parenteral drugs, stage C3 HIV with 2 weeks duration fever.

Critical Ultrasound Journal

Both headache and osteomalacia responded to vitamin D and calcium supplementation in a few weeks' duration.

The Journal of Headache and Pain

A 58-year-old man consulted for blurry vision in both eyes of 4 weeks duration.

Journal of Ophthalmic Inflammation and Infection

These research teams worked on inquiry-based projects ("streams") of four to six weeks duration.

Evolution: Education and Outreach

Thirty-four patients having daily or near daily headache of more than 1 week and <4 weeks duration were identified.

The Journal of Headache and Pain

In this retrospective observation, patients having daily headache of more than 1 week and <4 weeks duration were included.

The Journal of Headache and Pain

The most common indications are elective induction and postdate pregnancy, often applied to gestations of 40 to 41 weeks' duration.

American Journal of Obstetrics and Gynecology

Gestation is around three weeks duration.

Wikipedia

A prospective patient enters the model after showing symptoms of TB, most commonly a cough, of three weeks duration.

Plosone

Expert writing Tips

Best practice

When describing the length of a study or treatment, use "weeks' duration" to clearly indicate the timeframe, ensuring clarity and avoiding ambiguity in scientific or medical writing.

Common error

Avoid confusing the possessive form in "weeks' duration". Ensure the apostrophe is correctly placed after "weeks" to indicate that the duration is measured in weeks, not belonging to the weeks themselves.

Linguistic Context

The phrase "weeks' duration" functions as a modifier, specifically an adjective phrase, describing the length or extent of time. As Ludwig AI confirms, this is a valid and useful phrase in English. It clarifies the timeframe of an event, study, or condition, as seen in examples describing treatment periods and symptom durations.

Expression frequency: Very common

Frequent in

Science

85%

News & Media

7%

Encyclopedias

4%

Less common in

Wiki

2%

Formal & Business

1%

Reference

1%

Ludwig's WRAP-UP

In summary, "weeks' duration" is a grammatically sound and commonly used phrase, especially in scientific and medical contexts, to specify a timeframe measured in weeks. Ludwig AI confirms its validity, and its prevalence in academic journals highlights its suitability for formal writing. While alternatives like "lasting several weeks" exist, "weeks' duration" offers a precise and clear way to quantify time. It's essential to use the correct possessive form to avoid ambiguity. This analysis assists in proper usage and provides alternative phrasing options as needed.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

duration of weeks

This alternative reverses the order of the words while keeping the meaning virtually identical.

lasting several weeks

This alternative uses a verb-based construction to express the idea of something continuing for a number of weeks.

period of weeks

This substitute replaces "duration" with "period", emphasizing a distinct segment of time.

weeks-long period

This choice creates a compound adjective and uses "period" instead of "duration".

for a few weeks

This version is a more casual way to express a similar timeframe, implying a relatively short amount of weeks.

spanning several weeks

This option employs the verb "spanning" to highlight the extent of time covered.

a number of weeks

This alternative broadens the timeframe without specifying the precise quantity of weeks.

extended over weeks

This phrase emphasizes the idea of something stretching or unfolding over multiple weeks.

across a span of weeks

This option is more descriptive, using "span" to represent the measure of time.

weeks in length

This structure focuses on the measure of length, offering a slightly different emphasis.

FAQs

How can I use "weeks' duration" in a sentence?

You can use "weeks' duration" to specify the length of time something lasts. For example, "The study involved a treatment period of 12 "weeks' duration"".

What's a simpler way to express "weeks' duration"?

Alternatives include "lasting several weeks" or "a period of several weeks". The best choice depends on the specific context and desired level of formality.

Is it correct to say "weeks duration" without the apostrophe?

While understandable, "weeks' duration" is grammatically preferable because the apostrophe indicates that the duration is measured in weeks. Omitting it can sometimes cause ambiguity.

What's the difference between "weeks' duration" and "months' duration"?

"Weeks' duration" refers to a time frame measured in weeks, while "months' duration" indicates a time frame measured in months. Use the appropriate phrase based on the length of time you are describing.