waiting time; latency; standby time; queueing time
General term for the time spent waiting, including technical uses such as latency in computing or standby time for devices.
The waiting time at the hospital was long and tiring.
The latency of this app is a few seconds.
The waiting time at the hospital is always long.
Since it's a popular restaurant, the waiting time was long.
I read a book to make use of the waiting time.