Science Dictionary
frequency   (frē'kwən-sē)  Pronunciation Key 
  1. Physics The rate at which a repeating event occurs, such as the full cycle of a wave. Frequencies are usually measured in hertz. Compare amplitude. See also period.

  2. Mathematics The ratio of the number of occurrences of some event to the number of opportunities for its occurrence.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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