| 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 or observations having a certain value or characteristic. b.  See  relative frequency. [Latin frequentia, multitude, from frequēns, frequent-, crowded, numerous, frequent.] | 
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