Frequency (noun) Definition, Meaning & Examples

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noun, plural fre·quen·cies.
  1. 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.
    • 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.
  4. the number of times a value recurs in a unit change of the independent variable of a given function.
  5. the number of items occurring in a given category.
noun plural -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. 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
  4. statistics
    • the number of individuals in a class (absolute frequency)
    • the ratio of this number to the total number of individuals under survey (relative frequency)
  5. ecology
    • the number of individuals of a species within a given area
    • the percentage of quadrats that contains individuals of a species
    Frequency (noun) Definition, Meaning & Examples

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