Explanation: "Then" is an unspecific time in the future. When a person does not do something regularly, they can use this phrase to imply once in a while.
I go on a hike every now and then.
My mother calls me every now and then to see if I'm doing well.
It's not something I can do all the time, but I do it every now and then.
A:
Do you like skiing?
B:
I really enjoy skiing. It's one of my favorite sports.
A:
You must go very frequently then.
B:
I wish I could, but it's too expensive, so I only go every now and then.
Other Common Sentences
I like to go bowling once in a while.
I can't go often, but I go golfing with my friends from time to time.