Question

The times that callers are put on hold

Answer 1

either you're talking about the awful hold music, or you actually want the math in which case, the data are continuous because the data can take on any value in an interval.

Explanation:

Answer 2

When a caller is on hold, 60 seconds can seem like an eternity. To help mitigate this perception, many companies program the phone to play calming classical music or some jaunty jazz to make the interminable wait seem less tiresome.