The frequency with which the interest rate can change also varies.

The frequency of this publication varied between 1951 and 1991.

Frequency of the system will vary as load and generation change.

In addition, the size and frequency of the 'errors' could be varied.

The frequency and severity of pain did not vary by region, the report said.

For those who do their frequency can vary from yearly, to monthly, to many times a day.

Length and frequency of treatment vary according to the condition being treated.

Note: The frequency currently being used varies on a daily schedule.

Among other ethnic and racial groups, the frequency of the genes varies.

The frequency varies in different parts of the country.