Interval (noun)

1. A space of time between two events or states.
2. A continuous extent of time during which a state or condition prevails.
3. A gap or difference between things.

Origin:

Late middle english: from latin intervallum 'space between two walls', later 'interval', from inter- 'between' + vallum 'rampart, wall'.

Examples:

1. We'll meet again after a short interval.
2. The band took a ten-minute interval during the concert.
3. There was a long interval between the first and second acts.
4. The interval between the two signals was exactly 5 minutes.
5. There is a significant interval in the ages of the two sisters.