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Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

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at occasion

Grammar usage guide and real-world examples

USAGE SUMMARY

The phrase "at occasion" is not correct in standard written English.
The correct expression is "on occasion," which is used to refer to something that happens occasionally or from time to time. Example: "On occasion, I like to treat myself to a nice dinner."

⚠ May contain grammatical issues

Human-verified examples from authoritative sources

Exact Expressions

20 human-written examples

Severity of negative symptoms predicted poor neuropsychological performance on IQ, verbal fluency and memory measures at occasion one.

For the repeated administration of the same items to a sample over different occasions, Anderson (1985) introduced a multidimensional Rasch model with a time specific latent score θ it for person i at occasion t, such that, a latent linear score can be defined as η ijt = θ it − b j. (2).

Similarly, p2 is the probability that conditional on the individual being alive and in the sample, that it will be encountered at occasion 2, and so on.

Science

Plosone

Let p1 be the registration probability at occasion 1 and p2 at occasion 2, registration is independent from occasion.

Let, as in Ledberg and Wennberg [ 1], denote with n1 all registrations at occasion 1 (here every occasion is a new registration) and with n2 all registrations at occasion 2 that were not yet registered at occasion 1.

We considered identification of phenotype (at occasion t) to environment (at occasion t + 1) transmission in longitudinal model comprising genetic, common and unique environmental simplex models (autoregressions).

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Human-verified similar examples from authoritative sources

Similar Expressions

40 human-written examples

Nevertheless, short onramps at occasions are designed and built when right of way is constrained possibly by a variety of issues.

What are some of your favorite beverages to enjoy at occasions like networking events or dinners?

News & Media

Forbes

He led blessing ceremonies or invoked divine grace at occasions involving Sunni and Shiite Muslims, Christians, Jews, Zoroastrians and Baha'is.

News & Media

Huffington Post

This is usually solved by fixing these to zero (e.g., σ[a1] = σ[aT] = 0; same applies to the environmental occasion-specific variances), or by equating the variance components at occasions 1 and 2, and at occasions T − 1 and T (e.g., σ[at] = σ[at+1], where t = 1 or t = T − 1; same applies to the environmental occasion-specific variances).

Reliability assessment data was gathered at three occasions at two OFP/TMD clinical centers in Linköping and Kalmar, Sweden.

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Expert writing Tips

Best practice

Always use "on occasion" instead of "at occasion" to convey the meaning of something happening sometimes but not frequently. For example, "On occasion, I enjoy going to the theater."

Common error

Avoid using "at" where "on" is required. The correct preposition in this idiomatic expression is "on". Therefore, "on occasion" is the standard and accepted form.

Antonio Rotolo, PhD - Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

60%

Authority and reliability

1.5/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "at occasion" is grammatically incorrect. The correct form is the prepositional phrase "on occasion". This phrase functions as an adverbial modifier, indicating the frequency with which an action occurs. Ludwig AI confirms that "at occasion" is not a standard English construction.

Expression frequency: Missing

Frequent in

Science

0%

News & Media

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Formal & Business

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Less common in

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Ludwig's WRAP-UP

In summary, the phrase "at occasion" is grammatically incorrect in standard English. The correct and accepted form is "on occasion", which serves as an adverbial phrase indicating that something happens sometimes or occasionally. Ludwig AI analysis underscores the non-standard nature of "at occasion". To ensure clarity and correctness in writing, it's crucial to use "on occasion" instead. Given that there are no valid examples of "at occasion" in reliable sources, this phrase should be avoided in both formal and informal contexts.

FAQs

What is the correct way to say something happens sometimes?

The correct way to express that something happens sometimes is to use the phrase "on occasion". For example, "I visit my family on occasion".

Is it grammatically correct to use "at occasion"?

No, "at occasion" is not grammatically correct. The correct preposition to use in this phrase is "on", making the correct phrase "on occasion".

Which is correct, "on occasion" or "in occasion"?

"On occasion" is the correct and widely accepted phrase. "In occasion" is not standard English and should not be used.

What does "on occasion" mean, and how can I use it in a sentence?

"On occasion" means sometimes or occasionally. You can use it in a sentence like this: "On occasion, we go out for dinner."

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Most frequent sentences: