Millihertz, Frequency
As any SI unit, Hz can be prefixed; commonly used multiples are kHz (kilohertz, 103 Hz), MHz (megahertz, 106 Hz), and GHz (gigahertz, 109 Hz). Read more 
Frequency
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Angular velocity

As any SI unit, Hz can be prefixed; commonly used multiples are kHz (kilohertz, 103 Hz), MHz (megahertz, 106 Hz), and GHz (gigahertz, 109 Hz). Read more 
