on occasion
• occasionally; from time to time.
• "on occasion, the state was asked to intervene"
Similar:
occasionally,
sometimes,
from time to time,
(every) now and then,
(every) now and again,
at times,
every so often,
(every) once in a while,
on occasions,
on the odd occasion,
periodically,
at intervals,
irregularly,
sporadically,
spasmodically,
infrequently,
intermittently,
on and off,
off and on,
ever and anon,
