a minute - It could be 20 minutes, 5 minutes, or even a year, but never

It could be 20 minutes, 5 minutes, or even a year, but never just one.

I said I’d be back in a minute. Now it’s been a year and I’m still not back.

He said it would take a minute to get the food. Now it’s been 20 minutes and I still haven’t eaten.

They said it would take a minute to finish the job. Now it’s been five minutes and the job is still not done.