every once in a while

“But every once in a while ... it happens at first base. There’s some weird spots the first baseman has to be.”

"We don't want to be a team that every once in a while wins, or when people write us off we win a game," England captain Maro Itoje told BBC Sport.

Every once in a while, Cristiano Ronaldo would drop a message to Portugal national team doctor Jose Carlos Noronha.

“Every once in a while, Southern California gets unlucky, and those three switches get flipped on at once.”

In fact, every once in a while I look at some of this correspondence.”