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frequency noun

1 rate at which sth happens

ADJ. great | increased, increasing | relative The relative frequency of this illness in the area is of concern to all doctors. | alarming Bullets bounced off the rock with alarming frequency.

VERB + FREQUENCY decrease in, increase in Crime increases in frequency in less settled neighbourhoods. | decrease, increase, reduce The drug can reduce the frequency and severity of attacks.

PREP. with ~ Accidents of this sort are happening with increasing frequency.

2 of a wave

ADJ. high, low | ultrasonic | microwave, radio, television, vibration, wave | signal

FREQUENCY + NOUN range | band