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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
at different occasions
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "at different occasions" is not correct in standard written English.
The correct expression is "on different occasions." Example: "I have met her on different occasions throughout the year."
⚠ May contain grammatical issues
Science
Wiki
Alternative expressions(15)
on various occasions
at various times
on separate occasions
on numerous instances
at different moments
in several instances
at infrequent intervals
at different opportunities
at different cases
at various occasions
at different points
at several occasions
at different scenarios
at other occasions
at different instances
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
31 human-written examples
This is because the prn values of referents are not synchronized between agents: agents may encounter the same referent at different occasions, and the number of coreferent items may differ between agents.
They consist of several affine dynamic subsystems, between which switchings occur at different occasions.
Science
The above stated results demonstrate that, by controlling the size of WO3 nanorods, the electrochromic properties can be easily adjusted, especially the response time, indicating potential values for different response time required at different occasions.
Science
We have analysed several gene control data sets of Enchytraeus albidus comparing standard control test conditions, i.e. (1) from experiments performed at different occasions in time, (2) to culture media, (3) to acetone control, (4) from exposure time series (2, 4 and 8 days) and (5) between replicates.
Science
Refractory period of variable duration (1 10 min) was observed at different occasions.
Data were collected at different occasions during 2014 and 2015 with a focus on the leading practices of these 15 middle leaders.
Human-verified similar examples from authoritative sources
Similar Expressions
29 human-written examples
All the radiographs were assessed by two examiners at two different occasions at an interval of at least a week to check the intraexaminer and interexaminer reliability.
Science
There were 1,709 incident cases of T2DM identified over 320,703 person-years of follow up, from national registries requiring a physician's diagnosis, according to the criteria of FPG ≥7.0 mmol/L, fasting whole blood glucose ≥6.1 mmol/L measured at two different occasions, or at least two HbA1C values >6.0%.
Samples were taken at four different occasions, before intervention at -3 weeks, during intervention at two time points, 0 and 6 weeks, and after intervention at 24 weeks.
To evaluate precision and accuracy, QC samples were analysed within runs (intra-run validation) at 10 replicate analyses and between runs (inter-run validation) at 10 different occasions.
This assay was performed in duplicate at four different occasions.
Science
Expert writing Tips
Best practice
Although commonly used, prefer the grammatically correct phrase "on different occasions". While "at different occasions" appears in various sources, using "on" aligns with standard English.
Common error
Avoid using "at" before "different occasions"; the correct preposition is "on". For example, write "I saw her on different occasions", not "at different occasions".
Source & Trust
77%
Authority and reliability
3.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "at different occasions" functions as an adverbial phrase, modifying a verb by specifying when an action takes place. Although Ludwig AI suggests the standard form is "on different occasions", the phrase aims to provide temporal context.
Frequent in
Science
80%
Wiki
10%
Academia
5%
Less common in
News & Media
2%
Formal & Business
1%
Reference
2%
Ludwig's WRAP-UP
In summary, while "at different occasions" is a frequently used phrase to indicate events happening more than once, Ludwig AI identifies it as grammatically incorrect, suggesting "on different occasions" is the standard form. The phrase appears most commonly in scientific and academic contexts, although its presence on general websites indicates broader informal usage. It's best practice to use the grammatically correct "on different occasions" in formal writing. Alternatives such as "on various occasions" or "at various times" can also be considered.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
on various occasions
Uses "on" instead of "at", which is the grammatically correct preposition, and "various" to convey different instances.
on separate occasions
Replaces "different" with "separate" emphasizing the distinct nature of the instances.
on numerous instances
Uses "on" instead of "at", which is the grammatically correct preposition and substitutes "different occasions" with "numerous instances" for emphasis.
at various times
Substitutes "occasions" with "times", offering a more general reference to instances.
at different moments
Employs "moments" to specify particular points in time, rather than general instances.
at diverse instances
Replaces "occasions" with the more formal "instances" and "different" with "diverse."
in several instances
Shifts from using "at" to "in" and replaces "different occasions" with "several instances" for a slightly more formal tone.
during multiple events
Uses "during" to indicate a period, replacing "occasions" with "events" to specify happenings.
at varying junctures
Employs the more formal term "junctures" to refer to specific points in time or events.
at infrequent intervals
Conveys occurrences that are not regular or common, replacing "occasions" with "intervals".
FAQs
Is it grammatically correct to say "at different occasions"?
No, the grammatically correct phrase is "on different occasions". While "at different occasions" is sometimes used, it's not considered standard English.
What preposition should I use with "different occasions"?
The correct preposition to use with "different occasions" is "on", as in "on different occasions".
What can I say instead of "at different occasions"?
You can use alternatives like "on various occasions", "at various times", or "on separate occasions".
Which is correct, "at different occasions" or "on different occasions"?
"On different occasions" is the correct and preferred phrase. "At different occasions" is considered grammatically incorrect.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
77%
Authority and reliability
3.5/5
Expert rating
Real-world application tested