every now and

(every) now and again

Occasionally; sometimes. I don't travel often, but every now and again I just need to get away from the city. My mom has sweets now and again but mostly eats only healthy foods.
See also: again, and, now

(every) now and then

Occasionally; sometimes. Josh does stop by the store every now and then, but I haven't seen him lately. I don't eat a lot of sweets, but every now and then I just need a piece of chocolate cake.
See also: and, now
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

every now and

then/again
From time to time; occasionally.
See also: and, every, now
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
See also: