I'm writting something like this "A help at/in the most difficult time/moment", and I don't know what is correct, at or in… and the same thing with time or moment, I don't know what word I should use.
Learn English – “At the time” or “In the time”
grammarmeaningprepositionsword-differenceword-usage
Best Answer
All four iterations could be considered correct and synonymous:
Without further context, it's hard to say for sure which one I would recommend.
As a footnote, I'd probably change the to something more specific (but, again, without more context, it's hard to say for sure what would constitute an improvement):