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frequency

frequency


fre·quen·cy  (frkwn-s)
n. pl. fre·quen·cies
1. The property or condition of occurring at frequent intervals.
2. Mathematics & Physics The number of times a specified periodic phenomenon occurs within a specified interval, as:
a. The number of repetitions of a complete sequence of values of a periodic function per unit variation of an independent variable.
b. The number of complete cycles of a periodic process occurring per unit time.
c. The number of repetitions per unit time of a complete waveform, as of an electric current.
3. Statistics
a. The number of measurements in an interval of a frequency distribution.
b. The ratio of the number of times an event occurs in a series of trials of a chance experiment to the number of trials of the experiment performed.

[Latin frequentia, multitude, from frequns, frequent-, crowded, numerous, frequent.]

frequency [ˈfriːkwənsɪ]
n 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. (Mathematics) 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. Symbol ν, f
4. (Mathematics & Measurements / Statistics) Statistics
a.  the number of individuals in a class (absolute frequency)
b.  the ratio of this number to the total number of individuals under survey (relative frequency)
5. (Life Sciences & Allied Applications / Biology) Ecology
a.  the number of individuals of a species within a given area
b.  the percentage of quadrats that contains individuals of a species Also called (for senses 1, 2) frequence
[from Latin frequentia a large gathering, from frequēns numerous, crowded]

frequency  (frkwn-s)
1. Physics The rate at which a repeating event occurs, such as the full cycle of a wave. Frequencies are usually measured in hertz. Compare amplitude. See also period.
2. Mathematics The ratio of the number of occurrences of some event to the number of opportunities for its occurrence.


frequency  /frikwnsi/  n. -cies 1 [U] the rate at which s.t. happens, occurs: The buses stop here with regular frequency. 2 [U] s.t. that happens often: The article discussed the reasons for the frequency of violent crime in urban areas. 3 [C] the number given to a transmission wave, esp. of a radio station: The various frequencies on the radio are crowded together in large areas such as New York. frequency

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