Rashleigh was no man to be surprised or thrown off his guard by sudden occurrences.

The elf blinked, caught off-balance by this sudden occurrence.

A sudden new occurrence made this conversation superfluous.

All the castle's defenses had been caught off guard by this sudden occurrence.

That sudden occurrence in three trend-setting states encouraged us to predict a national trend.

The ship had not heard of the worldwide epidemic and thus the sudden occurrence alarmed the ship's company greatly.

Everything became filtered through this sudden occurrence in his life.

Obviously, some sudden occurrence had been responsible.

It seemed that any chance noise or sudden occurrence could make her start.

In the books there is quite a lot of loose speculation on the sudden occurrence of the triffids.