They were in the nature of payments to be repeated periodically.

If the results are normal, the tests should be repeated periodically until the age of 30.

The brain measurements and tests were repeated periodically over six years.

While the contest theme changes every week, some popular contests are periodically repeated.

And the only way he can make sure is by periodically repeating the nerve gas paralysis.

Surveys are repeated periodically to track trends as technology and clinical practices change.

The schedules are repeated periodically, so that the system shows a predictable repetitive behavior.

Site survey must be repeated periodically for reliable operation.

It usually consists of short amounts of work that must be repeated periodically.

Beach nourishment is expensive, and must be repeated periodically.