# Frequence

[free-kwuh n-see] /ˈfri kwən si/

**noun**, plural frequencies.

1.

Also, frequence. the state or fact of being frequent; frequent occurrence:

We are alarmed by the frequency of fires in the neighborhood.

2.

rate of occurrence:

The doctor has increased the frequency of his visits.

3.

Physics.

4.

Mathematics. the number of times a value recurs in a unit change of the independent variable of a given function.

5.

Statistics. the number of items occurring in a given category.

/ˈfriːkwənsɪ/

**noun** (pl) -cies

1.

the state of being frequent; frequent occurrence

2.

the number of times that an event occurs within a given period; rate of recurrence

3.

(physics) the number of times that a periodic function or vibration repeats itself in a specified time, often 1 second. It is usually measured in hertz ν, f

4.

(statistics)

5.

(ecology)

n.

1530s, from French fréquence, from Latin frequentia (see frequent).

n.

1640s, “fact of occurring often,” from Latin frequentia “a crowding, crowd,” from frequentem (see frequent).

Earlier it had been used in a now-obsolete sense of “state of being crowded” (mid-16c.); sense in physics, “rate of recurrence,” especially of a vibration, is from 1831. In radio electronics, frequency modulation (1922, abbreviated F.M.) as a system of broadcasting is distinguished from amplitude modulation (or A.M.).

frequency

(frē’kwən-sē)

In physics, the number of crests of a wave that move past a given point in a given unit of time. The most common unit of frequency is the hertz (Hz), corresponding to one crest per second. The frequency of a wave can be calculated by dividing the speed of the wave by the wavelength. Thus, in the electromagnetic spectrum, the wavelengths decrease as the frequencies increase, and vice versa.

Tagged: f

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