I see him every now and then,but not often.这里的every是什么用法?

I see him every now and then,but not often.这里的every是什么用法?
I see him every now and then,but not often.这里的every是什么用法?

I see him every now and then,but not often.这里的every是什么用法?
every now and then 词组,意思是：有时,时而,不时