It was like there was this four-year gap in their lives that they didn't want anyone to know about.

If your first-born child is a girl, then you are allowed to try for another baby after a four-year gap.

That left a four-year gap between her and her next older sister.

Coincidentally, there is a four-year gap between each of his films.

It was released in 1991, after a four-year gap with no albums.

There was a four-year gap between the end of the second season and the beginning of the third.

The four-year gap does raise a lot of questions to be answered.

It was released in 1996, after another four-year gap with no albums.

After a four-year gap he toured as a duo with Marie.

There's a four-year gap between blacks and whites on the national tests.