$$f = \frac{v}{\lambda}$$
where:
* f is the frequency in hertz (Hz)
* v is the velocity of the wave in meters per second (m/s)
* λ is the wavelength in meters (m)
So, if you know the velocity of the wave and the wavelength, you can calculate the frequency. For example, if a wave has a velocity of 343 m/s and a wavelength of 1 meter, then the frequency is 343 Hz. This means that 343 wavelengths of the wave will pass a position in 1 second.
