interval

A space between objects, points, or units, especially when making uniform amounts of separation.

An amount of time between events, especially of uniform duration separating events in a series.

A segment of an athletic workout in which an athlete runs, swims, or does other exercise over a series of predetermined distances at regular time increments with intermittent rests.

A set of numbers consisting of all the numbers between a pair of given numbers along with either, both, or none of the endpoints.

A closed interval.