noun, plural fre·quen·cies.
- the number of periods or regularly occurring events of any given kind in unit of time, usually in one second.
- the number of cycles or completed alternations per unit time of a wave or oscillation. Symbol: F; Abbreviation: freq.
- frequency band,
- frequency curve,
- frequency distribution,
- frequency function,
- frequency modulation
Origin of frequency
Examples from the Web for frequency
That frequency is within the range used by amateur radio operators, so anyone can listen in.Luxembourg and China Team Up on Private Mission to the Moon|Matthew R. Francis|October 26, 2014|DAILY BEAST
One of the biggest concerns in Europe is the frequency of air traffic with West Africa.
Despairing about the length and frequency of the many fashion weeks has become a tired refrain.The Drama of Being a Model: Spike Jonze and Jonah Hill Land in Fashion Week|Allison McNearney|September 8, 2014|DAILY BEAST
Dr. Greenberg also indicates that the frequency of splurges can change depending on where you are in relation to your goal.When Is It OK to Cheat? The Pros and Cons of Cheat Days|DailyBurn|July 14, 2014|DAILY BEAST
Even at the age bracket where men and women appear closest in frequency, there is nothing remotely close to masturbation parity.C’mon, Ladies, Masturbation Isn’t Just for Bad Girls|Emily Shire|June 19, 2014|DAILY BEAST
The frequency with which the Glow-worm was being laid up for repairs was beginning to get on our nerves.The Campfire Girls Go Motoring|Hildegard G. Frey
Then he observed sweats that were terrifying in their frequency—sweats at night that left the print of her body on the sheets.Woman Triumphant|Vicente Blasco Ibaez
The frequency with which literature is represented is probably more genuine.Studies in the Psychology of Sex, Volume 2 (of 6)|Havelock Ellis
Any form of effort demanding the attention will, as a general rule, lessen their frequency or abolish them altogether.Tics and Their Treatment|Henry Meigne
It is not the frequency of the intervention, but its purpose and consequences that make it socialistic.Contemporary Socialism|John Rae
noun plural -cies
- the number of individuals in a class (absolute frequency)
- the ratio of this number to the total number of individuals under survey (relative frequency)
- the number of individuals of a species within a given area
- the percentage of quadrats that contains individuals of a species
Word Origin for frequency
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.).
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.