Despite their rivalry, they occasionally collaborate, usually to the advantage of both.

They spent a lot of time together in the studio and occasionally collaborated on several paintings.

Despite being involved with other projects, the trio occasionally collaborated.

Rather than forming separate and distinct groups, each association occasionally collaborate for certain events.

The two choirs currently share service duties and occasionally collaborate.

Mr. Black will also continue to collaborate occasionally with Circle.com.

Peck and Williams shared similar styles, leading the two to occasionally collaborate on illustrations together.

The commissioners, on the other hand, were members of the religious orders who collaborated occasionally with the Holy Office.

Groups occasionally collaborate in organizing dinner discussions, debates, and events with a bipartisan scope.

Although drug operators and guerrillas occasionally collaborate, their latest offensives are apparently not related.