Answer:
The word "duration" indicates the time period over which an event occurs, or the amount of time an object, structure or situation exists (i.e. the duration of a war, or of a pyramid).

In music, duration is the time interval over which a tone is sustained.

First answer by Grnthghs. Last edit by Music mania. Contributor trust: 29 [recommend contributor recommended]. Question popularity: 7 [recommend question].