Meaning of INTERVAL in English
1》 an intervening time or space.
2》 a pause or break.
↘ Brit. a period of time separating parts of a theatrical or musical performance or a sports match.
3》 a space between two things; a gap.
4》 the difference in pitch between two sounds.
at ~s with time or spaces between, not continuously.
ME: from OFr. entrevalle , based on L. ~lum 'space between ramparts, ~'.
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004