Also, since the safety fields had - been known to fail occasionally, they never even knew if they'd be stopped.

Complete studies including autopsy may occasionally fail to disclose the cause.

Two months after he bought it, the Trooper would for no apparent reason occasionally fail to start.

But she occasionally failed to follow through with some of those ideas, he added.

Yet even the greatest of necromancers might fail occasionally, thought the baron.

His grades were average and he occasionally failed courses.

Notes occasionally failed to register, leaving gaps in a line, and the entire second movement dragged.

Some of the sites, however, do not keep regular hours, so attempts to reach them may occasionally fail.

A hard drive also includes controller electronics, which occasionally fail.

- She may occasionally fail, but overall there is a definite pattern of change and growth.