So you have a long running process, perhaps with a progress bar, and you want a text estimate of the remaining time, eg: “5 minutes remaining” “30 seconds remaining” etc.
If you don’t actually want to report clock time (due to accuracy or resolution or update-rate issues) but want to stick to the text summary, what is the correct paradigm?
Is “one minute” left displayed from 0 to 60 seconds? or from 1:00 to 1:59?
Say there’s 1:35 Left – is that “2 minutes remaining” or “1 minute remaining”?
Do you just pare it down to “A few minutes left” when you’re less than 3 minutes?
What is the preferred (least user-frustrating) method?
This is somewhat subjective. However, I would round to the minute until you get down to 30 seconds.
Avoid using the shortcut “minute(s)”. Spend the extra time to output “minute” for one minute and “minutes” for anything greater.