once in a while

(every) once in a while

Occasionally; sometimes. I don't travel often, but every once in a while I just need to get away from the city. My mom has sweets once in a while but mostly eats only healthy foods.
See also: once, while
Farlex Dictionary of Idioms.

once in a while

Occasionally, not very often, as in Once in a while I enjoy going fishing. [Mid-1800s] Also see every now and then; from time to time.
See also: once, while
The American Heritage® Dictionary of Idioms by Christine Ammer.

once (or every once) in a while

from time to time; occasionally.
1989 Annie Dillard The Writing Life Every once in a while Rahm saw a peephole in the clouds and buzzed over for a look.
See also: once, while
Farlex Partner Idioms Dictionary

(every) ˌonce in a ˈwhile

occasionally: We go to the theatre once in a while, but there’s not much worth seeing. OPPOSITE: all the time
See also: once, while
Farlex Partner Idioms Dictionary
See also:
  • (every) once in a while
  • every once in a while
  • at once
  • all at once
  • stampede out of
  • stampede out of (some place)
  • fortune knocks once at every man's door
  • once more
  • once and for all
  • double-dipping