every four weeks

USAGE SUMMARY

The phrase 'every four weeks' is correct and usable in written English.
You can use it to indicate a regular, recurring event which happens every four weeks. For example, 'I go to the doctor for a checkup every four weeks.'.

✓ Grammatically correct

Science

News & Media

Academia

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

Registration must be renewed every four weeks.

Yale University

Additional boosters will be given every four weeks until the participant has received six total injections.

Cornell University

Their analysis shows the number of sightings increased from six every four weeks in 1984 to 84 every four weeks in 2010.

The Guardian

"It's hard to run them every 30 days, every four weeks and keep them sharp".

The New York Times - Sports

Web subscriptions that include mobile apps range from $15 to $35 every four weeks.

The New York Times

Greenstart is investing in one new cleanweb company every four weeks.

The New York Times

The club offered members a new title, at a discount, every four weeks.

The New Yorker

Members are required to work a shift of 2 hours and 45 minutes every four weeks.

The New York Times

You could design a calendar simply by eating at Kajitsu every four weeks and taking pictures.

The New York Times - Food

The label for Lucentis recommends injections once every four weeks, though many doctors inject less frequently.

The New York Times

In the eight-week arm, the first three doses were given every four weeks.

The New York Times - Health

Expert writing Tips

Best practice

Use "every four weeks" to clearly indicate a recurring event with a specific interval, especially in medical, scientific, or scheduling contexts where precision is important.

Common error

Avoid using "monthly" as a direct substitute for "every four weeks" if precise scheduling is critical. While generally equivalent, "monthly" can be ambiguous due to varying month lengths. Using "every four weeks" removes this ambiguity.

Linguistic Context

The phrase "every four weeks" functions as an adverbial phrase of time, modifying a verb by specifying when an action occurs. Ludwig provides examples showing it used to describe the frequency of events such as medical treatments, meetings, or publications.

Expression frequency: Very common

Frequent in

Science

35%

News & Media

33%

Academia

9%

Less common in

Wiki

2%

Formal & Business

0%

Reference

0%

Ludwig's WRAP-UP

In summary, "every four weeks" is a grammatically correct and widely used adverbial phrase indicating the frequency of an event. Ludwig AI affirms that it is suitable for use in written English. With a neutral register, it is applicable across various contexts, from scientific publications to news articles. When precision is crucial, it is preferred over general terms like "monthly". Its function is to specify the time interval, ensuring clarity and precision in communication. Consider using alternatives like "monthly", "every 28 days", or "at four-week intervals" depending on the desired level of specificity.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

every 28 days

This provides a more precise measurement of the time interval, removing ambiguity.

at four-week intervals

This emphasizes the regularity and spacing of occurrences.

on a four-weekly basis

This is a more formal and emphatic way to express the regular recurrence.

monthly

This term generalizes the frequency to once a month, which is approximately equivalent but less precise.

once a month

Similar to 'monthly', this is a common but slightly less precise alternative.

every month

This is a general, less precise way to say approximately every four weeks.

each month

Similar to 'every month', emphasizing the regularity over the span of months.

every 28th day

This is highly specific and focuses on a particular date each time.

four weeks apart

Highlights the separation between events.

at the end of every four weeks

This specifies that something happens at the conclusion of each four-week period.

FAQs

How can I use "every four weeks" in a sentence?

You can use "every four weeks" to indicate the frequency of an event. For example, "The report is due "every four weeks"".

What's a more formal alternative to "every four weeks"?

A more formal alternative is "on a four-weekly basis". For example, "Payments are processed "on a four-weekly basis"".

Is it better to say "every four weeks" or "monthly"?

While "monthly" is generally understood to mean approximately "every four weeks", "every four weeks" is more precise. Use "every four weeks" when exact timing is important, as months can vary in length. If the precise period is not important you can use "monthly".

What does "every four weeks" mean?

"Every four weeks" means that something occurs once in a period of four weeks, or 28 days. It indicates a regular, recurring interval of time.