reciprocal seconds

The inverse second, reciprocal second, or per second (s^-1) is a unit of frequency, defined as the multiplicative inverse of the second (a unit of time). It is dimensionally equivalent to:

• Hertz (the SI unit for cycles per second)
• Becquerels (the SI unit for aperiodic or stochastic radionuclide events per second)

It also provides the denominator for temporal rates, such as that of angular frequency in radians per second.