Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
either at that time or
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "either at that time or" is correct and usable in written English.
You can use it to indicate two possible time frames or conditions that are being considered simultaneously. Example: "We can meet either at that time or later in the afternoon, depending on your availability."
✓ Grammatically correct
News & Media
Science
Wiki
Alternative expressions(3)
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
4 human-written examples
"Either at that time, or afterward," the guidebook's author continued, "an almost invisible square was clipped off the lower east end of the stone above and that one is sometimes taken for the foundation stone.
News & Media
Any realistic person would have, either at that time or this, realized that there was not room for three or four Independent States in the cramped territory between the desert and the sea -- there was hardly room for two.
News & Media
In addition, the restricted patterns of expression of some of the other genes within the tested regions might result in some genes being rejected as the causal gene because they are not expressed in zebrafish either at that time or location.
If you notice that certain products would meet the customers' needs, you can try to sell those products to the customer to install either at that time or at a future date.
Wiki
Human-verified similar examples from authoritative sources
Similar Expressions
56 human-written examples
According to Dr Dalen, dogs were either domesticated at that time, or the population split into modern wolves and a wild ancestor of modern dogs that later became extinct.
News & Media
If the interviewee was of eligible age, the interview was either initiated at that time or scheduled for later.
Science
Eligible patients were approached following ICU discharge; informed voluntary consent was either obtained at that time or following agreement to be contacted at home after hospital discharge.
Science
I think as time goes by there'll be an appreciation by people who weren't there, who either weren't born at that time or were too young or lived in a different part of the country or lived outside of the country, to realize that The Bottom Line was a very important stage.
News & Media
Research the outcome of the Supreme Court's decision in this case, and write an article about it, either as if it was written at that time or now.
News & Media
In the recent past (beginning of the generic's implementation in Brazil), generics accounted for only a small proportion of the medicines market in Brazil [ 30], because people were more likely to buy either the cheapest medicine (usually a similar, at that time) or the originator brand based on the belief that the latter were of better quality than generics or similar medicines.
Science
The report also questions Israel's claims to have gone above and beyond the requirements of international law in warning civilians of impending attacks, noting that warnings were either ineffective at the time or that civilians had nowhere to flee to.
News & Media
Expert writing Tips
Best practice
When using "either at that time or", ensure that the context clearly defines the 'that time' being referenced. This avoids ambiguity and ensures your writing is easily understood.
Common error
While grammatically correct, repeatedly using "either at that time or" can make your writing sound clunky. Consider shorter alternatives like "either then or" to improve flow and readability.
Source & Trust
81%
Authority and reliability
4.3/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "either at that time or" functions as a correlative conjunction, linking two alternative possibilities concerning a specific point in time. As Ludwig AI confirms, the phrase connects options that occur at the specified time or another. It helps to present mutually exclusive scenarios related to timing.
Frequent in
News & Media
35%
Science
35%
Wiki
15%
Less common in
Encyclopedias
5%
Formal & Business
5%
Academia
5%
Ludwig's WRAP-UP
In summary, "either at that time or" serves as a correlative conjunction that introduces alternative possibilities linked to a specific point in time. As validated by Ludwig AI, this phrase is grammatically correct. While considered neutral in tone, it appears across various contexts, including News & Media, Science, and Wiki articles. While it's perfectly acceptable, remember to define "that time" clearly and consider alternatives like "either then or" for conciseness.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
either then or
This alternative uses a more concise word, 'then', in place of 'at that time', maintaining the same meaning.
either at that moment or
This alternative replaces 'time' with 'moment' to emphasize the specific point in time being referred to.
either at that period or
This option uses 'period' instead of 'time' when speaking about specific time period.
either then or later
This uses "then" as replacement of "at that time" and adding a more generic "later".
either at that point or
This alternative substitutes 'point' for 'time', highlighting a specific instant.
either during that time or
This option uses 'during that time' to emphasize that the event occurred inside a specific period.
either at that juncture or
This alternative uses a more formal word 'juncture' to replace 'time'.
either on that occasion or
This alternative substitutes the word occasion for time, focusing on the specific occurrence.
either in those days or
This alternative is used to describe a point in time in the past.
either at the time or
This phrase shortens "at that time" to a simple "at the time"
FAQs
How can I rephrase "either at that time or" for variety?
You can replace "either at that time or" with shorter, similar phrases like "either then or", "either at that moment or", or "either then or later" depending on the context.
Is it ever incorrect to use "either at that time or"?
The phrase "either at that time or" is grammatically correct, but can sometimes be wordy. Ensure the "that time" is clearly defined in your context to avoid ambiguity. Consider alternatives if a shorter option fits.
What's the difference between "either at that time or" and "either at the time or"?
"Either at that time or" refers to a specific point in the past or future that has been previously mentioned or is implied. "Either at the time or" is less specific. Use "either at that time or" when referring to a particular moment already established in the conversation or writing.
In what contexts is "either at that time or" most appropriate?
The phrase "either at that time or" is appropriate in formal writing or speech where you need to clearly specify that you are referring to a previously mentioned time. In more informal settings, you might prefer something shorter like "either then or".
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
81%
Authority and reliability
4.3/5
Expert rating
Real-world application tested