The classes are about one hour in length, with occasional double periods lasting two hours.

In her writings she avoided most punctuation except for the occasional period.

If it weren't for the occasional periods of un-madness, that tree might have died by now.

The region also experiences occasional periods of drought, during which the city sometimes has restricted water use by residents.

"I have been having occasional periods of nausea today," Nicole replied.

The oil market will have occasional wild periods, as in 1973 and 1979, but the long-term average price is likely to be moderate.

Would men, with this freedom accessible, ever accept the occasional periods of impotence after demanding work?

From then on, he followed the policy of scouring the depths at occasional periods.

It may be difficult or impossible to handle occasional periods of high demand between two spokes.

One dull day after another, with occasional periods of boredom.