An Increment of Time (?)

Yesterday, I was using the web site of our Recorder of Deeds. A message came up telling me that what I had requested may take “a few moments”.
All right. I can handle “moment” in the singular. It is an indefinite increment of time – a “brief period”, according to the Concise Oxford. Fine. But to put a plural on that? How can you pluralize the indefinite? How do you know whether there has been more than one moment? If someone said, okay, a moment = 90 seconds, then you’d have a rough idea of how much time “a few moments” might be.
Of course, using that reasoning, I suppose I need to lodge an objection to “one moment, please”, because this implies that there can be more than one moment and that the same waiting period would involve more than one moment instead of a long moment.
I’d continue this, but I’ve lost momentum.