off and on
US /ɔf ænd ɑn/
UK /ɔf ænd ɑn/

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.