once every three days

USAGE SUMMARY

The phrase "once every three days" is correct and usable in written English.
You can use it to describe an action or event that occurs at three-day intervals. Example: "I water my plants once every three days to ensure they stay healthy."

✓ Grammatically correct

News & Media

Science

Academia

Wiki

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

It has shrunk from 16 pages, eliminated color and reduced its frequency from every day to once every three days.

The New York Times

No matter that doctors said anything from three times a day to once every three days was normal, there was money to be made by convincing people of the great peril of "irregularity".

The New York Times - Health

Studies have generally confirmed the "three and three" rule that normal bowel frequency varies between three times a day, and once every three days.

Vice

The frequency of treatments varied from once a day to once every three days and the duration of an entire treatment course lasted from one to 37 days.

BMC Complementary and Alternative Medicine

According to a bifactorial design, six treatments, differing in the supplement and feeding frequency, were tested: the dry diet supplemented with Artemia nauplii or decapsulated cysts was supplied once a day, once every two days and once every three days.

Aquaculture

The snowplow passed only once every three days.

The New Yorker

That's a bit more than once every three days.

The Washington Post

Try to cut out alcohol every other day or have a drink once every three days.

Independent

So most products require reapplication about once every three days to maintain the color.

The New York Times - Health

In contrast, a young athlete dies from a cardiac incident once every three days in the United States, researchers say.

The New York Times - Sports

Marriage was not for her, she added, unless she could see her spouse only once every three days.

The Guardian - Opinion

Expert writing Tips

Best practice

When scheduling events or tasks, specify the starting date to avoid ambiguity. For instance, instead of saying "Apply fertilizer "once every three days", specify "Apply fertilizer "once every three days", starting October 16th."

Common error

Resist the urge to replace the phrase "once every three days" with overly technical or verbose alternatives unless necessary for a specific context. Simplicity often enhances clarity.

Linguistic Context

The phrase "once every three days" functions as an adverbial phrase of frequency, modifying a verb to indicate how often an action occurs. As evidenced by Ludwig, it is used across various contexts to specify a recurring interval.

Expression frequency: Very common

Frequent in

News & Media

45%

Science

35%

Wiki

10%

Less common in

Academia

5%

Formal & Business

3%

Encyclopedias

2%

Ludwig's WRAP-UP

In summary, the phrase "once every three days" serves as a straightforward and widely recognized adverbial phrase indicating frequency. Ludwig AI affirms its grammatical correctness and versatility across diverse registers, from formal scientific publications to casual news reports. Its purpose is primarily to specify the recurrence of events at consistent three-day intervals. Common alternative phrases include "every three days" or "at three-day intervals". When using this phrase, ensure clarity by specifying the starting date for recurring events. The high frequency of this phrase across various sources underscores its common usage in contemporary English.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

every third day

Rephrases the original, keeping the exact meaning, but altering the word order.

every 3 days

Uses a numerical representation, making it more concise and suitable for schedules or logs.

every seventy-two hours

Replaces the phrase with its equivalent in hours, providing a more precise measurement of time.

occurring every three days

Emphasizes the occurrence of an event or action, highlighting regularity.

once per three days

Changes the prepositional phrase to emphasize the 'per' frequency.

at three-day intervals

Emphasizes the regular spacing of events across time.

with a frequency of three days

More formal phrasing, suitable for technical or scientific contexts.

on a tri-daily basis

Substitutes 'once every' with 'on a' and uses 'tri-daily', altering the phrasing slightly.

tri-diurnal

Uses a single word to convey the action happening every three days, which is more concise but less common.

every other two days

Changes the structure to emphasize that it is 'every other' instance of a two-day period.

FAQs

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

You can use "once every three days" to describe how often something happens. For example, "The medication should be taken "once every three days".

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

A shorter way to say "once every three days" is "every three days".

Is it correct to say "one time every three days" instead of "once every three days"?

While "one time every three days" is understandable, "once every three days" is more concise and grammatically preferred. Consider using alternatives like "every three days".

What does "once every three days" imply about regularity?

"Once every three days" implies a recurring action or event with a consistent interval of three days between each occurrence.