frequency
noun
[ ˈfriːkw(ə)nsi ]
• the rate at which something occurs over a particular period of time or in a given sample.
• "an increase in the frequency of accidents due to increased overtime"
• the rate per second of a vibration constituting a wave, either in a material (as in sound waves), or in an electromagnetic field (as in radio waves and light).
• "different thicknesses of glass will absorb different frequencies of sound"
Origin:
mid 16th century (gradually superseding late Middle English frequence ; originally denoting a gathering of people): from Latin frequentia, from frequens, frequent- ‘crowded, frequent’.
