We ran laps at 30-second intervals.
An example of an interval is a 15-minute gap between train arrivals.
We set up hurdles at intervals of 15 yards around the track.
- In a series separated by space or time:Trees planted at intervals; coughing at intervals.
- once in a while
- here and there
Idioms and Phrasal Verbs
Origin of interval
- Middle English intervalle from Old French from Latin intervallum inter- inter- vallum rampart
From American Heritage Dictionary of the English Language, 5th Edition