Primarily used for wave phenomena (radio, sound, light, etc.). In everyday contexts, it often refers to radio frequencies.
Please tune this radio to an FM frequency.
The pitch of a sound is determined by its frequency.
I tuned the radio to the right frequency and listened to my favorite program.
We measured the frequency of the signal with a dedicated device.
We changed the frequency to avoid interference.
Because this radio wave has a high frequency, its range is narrow.
high frequency; HF
intermediate frequency; IF