<p><strong>Noun:</strong></p><ul><li>(plural frequencies) the state or fact of being frequent; frequent occurrence: <em>We are alarmed by the frequency of fires in the neighborhood.</em></li><li>Synonyms: regularity, recurrence, repetition</li><li>Rate of occurrence: <em>The doctor has increased the frequency of his visits.</em></li><li>Physics: the number of periods or regularly occurring events of any given kind in a unit of time, usually in one second; the number of cycles or completed alternations per unit time of a wave or oscillation.</li><li>Mathematics: the number of times a value recurs in a unit change of the independent variable of a given function.</li><li>Statistics: the number of items occurring in a given category.</li></ul>