Once per year, a minor release should occur which can include new features.

The commercial release of the single didn't occur until Summer 2001.

It was the second time such a release had occurred.

The report said it was unclear where or exactly when the release might occur.

This release should occur no more than one year after these activities.

The limited release of the film occurred during the month after the September 11 attacks.

It is possible an earlier release occurred on 21 July 2008.

However, its official release did not occur until 26 September 2011.

The officials did not say when the release would occur.

A fourth release under a new free software license occurred in 2002.