off and on

US /ɔf ænd ɑn/
UK /ɔf ænd ɑn/
"off and on" picture
1.

a intermittenza, di tanto in tanto

sometimes but not regularly or continuously

:
It rained off and on all day.
Ha piovuto a intermittenza tutto il giorno.
They've been dating off and on for years.
Si frequentano a intermittenza da anni.