If you were to pick out a single particular frequency, the sound it makes would probably not be at all soothing. (momtricks.com)
A tunable filter can pick out light signals of particular frequencies, allowing it to select a signal from multiple frequencies, each of which carries data. (sciencedaily.com)
Oversubscription criteria often applied on the basis of the scale of parents» religious practice, in particular the frequency of church attendance. (educationbusinessuk.net)