Every now and then means occasionally, without any pattern. Every now and then he sends a postcard.
It says less often than regularly and more often than rarely, and the vagueness is deliberate. Every now and again is the same phrase with a different tail.
1phraseevery now and thenOccasionally, without any pattern.
“Every now and then the heating makes a noise like that.”
every now and then is a phrase.
Also accepted in games: from time to time
Practised in Small Talk & Everyday Phrases