This often occurs repeatedly over a sustained period of time.

Folk songs from the area repeatedly occur in the film.

However, problems are occurring repeatedly, particularly in regions near national borders.

This has occurred repeatedly in the history of science.

In any given flow, similar, although not identical, patterns occur repeatedly.

This behaviour occurred repeatedly over the next few days, the fish 'playing dead' every time I returned into their field of vision.

If the metamorphosis occurred repeatedly in nature, it was necessary to survival.

During a single episode of vertigo, this action will occur repeatedly.

If these hemorrhages occur repeatedly, be sure to see a physician.

They recall, instead, that such adjustments have repeatedly occurred in this long bull market.