every now and then
every now and again
every so often
every once in a while
At fairly regular intervals; fairly often; repeatedly.
Довольно регулярно; довольно часто; время от времени; иногда.
John comes to visit me every now and then.
It was hot work, but every so often Susan would bring us something cold to drink.
When I am tired of sitting, every so often I stand up and walk about the room.
Every so often my brother and I get together for a camping trip.
in a while
Later, at some time in the future; after a time that is not short and not long.
The boys gathered some wood, and in a while, a hot fire was burning.
once in a while
Not often; not regularly; sometimes; occasionally.
We go for a picnic in the park once in a while.
Once in a while the puppy would run away, but usually he stayed in the yard.
Gary gets a cold once in a while even though he takes good care of himself.