The period of a wave is the time taken for one wave to be produced or the time for one complete oscillation or vibration.
It is also the time taken for one whole wave to pass a point.
Period is measured in seconds.
v = wave speed in metres per second, m/s
f = frequency in hertz, Hz
(lambda) = wavelength in metres, m
All waves, including sound waves and electromagnetic waves, follow this equation.
It should be noted that some particular waves have their own specific speeds: