frequency of action

Because they really only come once in a blue moon.

While she was in Japan, she frequently visited Kyoto.

She reversed her decision again, which infuriated all of us.

She rarely goes out on Sundays.

She rarely sheds tears.

She's almost never late for her commitments.

She rarely eats breakfast.

She's almost never late to school.

She rarely goes out.

She rarely goes to that sort of place.

She broke the toaster again.

She almost never goes to bed before eleven.

She often visits this country.

I often go to that bookstore.