at intervals of two weeks

USAGE SUMMARY

The phrase "at intervals of two weeks" is correct and usable in written English.
You can use it to describe a recurring event or action that takes place every two weeks. Example: "The team meets at intervals of two weeks to discuss project updates and progress."

✓ Grammatically correct

Science

News & Media

Wiki

Human-verified examples from authoritative sources

Exact Expressions

5 human-written examples

To produce anti-sera, mice were immunized subcutaneously with 20 µg recombinant protein in complete Freund's adjuvant as primary immunisation, and given 3 boost immunisations at intervals of two weeks with the same quantity of protein emulsified with incomplete Freund's adjuvant.

Plosone

The aftercare coordination consists of six phone contacts at intervals of two weeks that are performed by therapists in the inpatient units.

BMC Psychiatry

See Table 4. Non-randomized controlled studies: These studies administered MDA at intervals of two weeks to 10 weeks for between eight and 23 rounds, alongside IRS.

Cochrane Database of Systematic Reviews

After the inpatient treatment, the patients in the intervention group will receive six aftercare coordination phone contacts at intervals of two weeks that will be performed by their inpatient treatment therapists for 12 weeks.

BMC Psychiatry

Blood was collected from the lateral saphenous vein of a hind limb of 5 mice per group one day prior to each immunization and at intervals of two weeks after inoculation.Sera were separated and stored at -20°C until analyzed for specific antibodies.

BMC Infectious Diseases

Human-verified similar examples from authoritative sources

Similar Expressions

55 human-written examples

There were three holiday episodes—"Pinkeye", "Starvin' Marvin" and "Mr. Hankey, the Christmas Poo which aired at intervals of three weeks, while the remaining four aired later in February 1998.

Wikipedia

Non-respondents received two postal reminders at intervals of three weeks.

BMC Medical Research Methodology

To increase participation in the study non-respondents were sent up to two reminder letters and a new copy of the questionnaire at intervals of three weeks.

BMC Public Health

A self -administered questionnaire that had been specially developed and pretested was posted to nurses in September 2006 and non-responders were sent questionnaires up to two more times at intervals of four weeks.

Human Resources for Health

During the implementation phase two workshops (each 2 days with 720 min duration) at intervals of eight weeks will take place together with all BET-therapists from both rehabilitation centres.

BMC Musculoskeletal Disorders

The practice nurses were trained to deliver five telephone coaching sessions at intervals of six weeks in the first six months, telephone coaching sessions at months 8 and 10, a face to face coaching session at 12 months, and a final telephone coaching session at 15 months.

British Medical Journal

Expert writing Tips

Best practice

When describing recurring events, use "at intervals of two weeks" to clearly specify the frequency. This phrasing is particularly useful in scientific, medical, or formal contexts where precision is important.

Common error

Avoid ambiguity by clearly stating the interval. Saying "intervals of weeks" without specifying the number can lead to confusion. Always specify the precise number of weeks (e.g., "at intervals of two weeks" not "at intervals of weeks").

Linguistic Context

The phrase "at intervals of two weeks" functions as an adverbial phrase, modifying a verb or clause by specifying the frequency or spacing of an action or event. It indicates how often something occurs, providing a temporal dimension to the described activity. As Ludwig AI confirms, the phrase is correct and usable.

Expression frequency: Common

Frequent in

Science

73%

News & Media

16%

Wiki

11%

Less common in

Formal & Business

0%

Encyclopedias

0%

Academia

0%

Ludwig's WRAP-UP

In summary, the phrase "at intervals of two weeks" is a grammatically correct and commonly used prepositional phrase that functions as an adverbial modifier, primarily in formal and scientific contexts. As indicated by Ludwig AI, its main purpose is to specify the timing and regularity of repeated actions or events. While simpler alternatives like "biweekly" or "every other week" exist, "at intervals of two weeks" offers greater precision and is therefore preferred in contexts where clarity is paramount. Common errors involve ambiguity in specifying the exact interval, so it's crucial to be precise.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

biweekly

A single word replacing a phrase; concise.

every other week

More casual phrasing; emphasizes the skipping of one week.

once every two weeks

Emphasizes the singularity of the occurrence within the two-week period.

fortnightly

A formal, single-word alternative to "every two weeks".

at a two-week cadence

More technical/formal; emphasizes the rhythm/sequence.

separated by two weeks

Focuses on the gap between events.

with a two-week gap

Similar to 'separated by two weeks', emphasizing the interval.

at a frequency of two weeks

Highlights the rate of occurrence.

in two-week cycles

Implies a recurring pattern or rhythm.

spaced two weeks apart

Highlights the distance or separation between occurrences.

FAQs

How can I use "at intervals of two weeks" in a sentence?

You can use "at intervals of two weeks" to describe any process or event that repeats every two weeks. For example, "The study participants were assessed "at intervals of two weeks" to monitor their progress".

What's a simpler way to say "at intervals of two weeks"?

A simpler way to say "at intervals of two weeks" is "every other week" or "biweekly". These alternatives are more concise and suitable for less formal contexts.

Is there a difference between "at intervals of two weeks" and "every two weeks"?

While "at intervals of two weeks" and "every two weeks" are similar, "at intervals of two weeks" often implies a more structured or scheduled arrangement, especially in scientific or medical contexts. "Every two weeks" is more general and can be used in everyday conversation.

When is it appropriate to use "at intervals of two weeks" over "biweekly"?

Use "at intervals of two weeks" in formal writing or when precise language is needed, such as in scientific reports or medical instructions. "Biweekly" is suitable for general communication but can sometimes be ambiguous (meaning twice a week or every two weeks), so clarity is key.