every three days

USAGE SUMMARY

The phrase 'every three days' is correct and usable in written English.
You would typically use this phrase when referring to something that happens or needs to be done on a regular schedule, such as "I need to take my medicine every three days".

✓ Grammatically correct

Science

News & Media

Wiki

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

Every three days.

The Economist

"We reassess him every three days.

Independent

We started meeting up every three days.

The Guardian - Lifestyle

He buys new clothes every three days.

The Guardian - Books

The snowplow passed only once every three days.

The New Yorker

Ms. Li said they wrote each other every three days.

The New York Times

Each pine log must be replaced every three days.

The Economist

Corn crops were irrigated every three days.

International Journal of Recycling of Organic Waste in Agriculture

Media were replenished every three days.

International Nano Letters

Two new hotels open every three days.

Forbes

Each nutrient solution was renewed every three days.

Rice

Expert writing Tips

Best practice

When describing a recurring event or task, use "every three days" to clearly indicate the frequency. For example, "The medication should be administered every three days."

Common error

Avoid confusing "every three days" with phrases indicating duration, such as "for three days". The former indicates a recurring event, while the latter specifies a continuous period.

Linguistic Context

The phrase "every three days" functions as an adverbial phrase, modifying verbs to indicate frequency. It specifies how often an action or event occurs, as Ludwig examples demonstrate in contexts ranging from medical treatments to agricultural practices.

Expression frequency: Very common

Frequent in

Science

50%

News & Media

23%

Wiki

8%

Less common in

Formal & Business

3%

Encyclopedias

0%

Reference

0%

Ludwig's WRAP-UP

The phrase "every three days" is a common and grammatically sound adverbial phrase used to indicate frequency. Ludwig AI confirms its validity and usability in various contexts. It is particularly prevalent in scientific and news media sources, indicating its wide acceptance in both formal and informal settings. For alternative expressions, consider "every 72 hours" or "every third day". Be mindful of differentiating it from duration phrases like "for three days". By following these guidelines, you can confidently and accurately use "every three days" in your writing.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

every 3 days

Uses numerals for a more concise representation of the frequency.

every 72 hours

Expresses the same frequency using a specific time interval.

every third day

Emphasizes the ordinal position of the day on which the event occurs.

once every three days

Adds emphasis to the frequency, specifying that it happens only once within that period.

every other other day

An informal way to express the same frequency.

at three-day intervals

Highlights the regularity of the spacing between occurrences.

each three days

A slightly less common way to state the frequency.

on a three-day cycle

Focuses on the cyclical nature of the frequency.

three days apart

Describes the spacing between events rather than the frequency of a single event.

tri-diurnally

Uses a less common, formal adverb to indicate occurrence every three days.

FAQs

How can I use "every three days" in a sentence?

You can use "every three days" to describe how often something happens, such as, "The plants need to be watered "every three days"."

What's a simpler way to say "every three days"?

A simpler alternative is to use "every 72 hours" if you need to be precise, or "every third day" for a more casual approach.

Is there a more formal way to say "every three days"?

Yes, you could use the term "tri-diurnally", though it is not commonly used in modern English.

What is the difference between "every three days" and "for three days"?

"Every three days" indicates a recurring action with that interval, whereas "for three days" indicates an action that lasts a total of three days.