Noun

(series)

A number of things that follow on one after the other or are connected one after the other.

* {{quote-book, year=1963, author=(Margery Allingham), title=(The China Governess)

, chapter=19 citation , passage=When Timothy and Julia hurried up the staircase to the bedroom floor, where a considerable commotion was taking place, Tim took Barry Leach with him. […]. The captive made no resistance and came not only quietly but in a series of eager little rushes like a timid dog on a choke chain.}}

* {{quote-magazine, date=2013-06-28, author=(Joris Luyendijk)

, volume=189, issue=3, page=21, magazine=(The Guardian Weekly) , title= Our banks are out of control , passage=Seeing the British establishment struggle with the financial sector is like watching an alcoholic […].  Until 2008 there was denial over what finance had become. When a series of bank failures made this impossible, there was widespread anger, leading to the public humiliation of symbolic figures.}}

(US, Canada) A television or radio program which consists of several episodes that are broadcast in regular intervals

Friends was one of the most successful television series in recent years.

(British) A group of episodes of a television or radio program broadcast in regular intervals with a long break between each group, usually with one year between the beginning of each.

(mathematics) The sum of the terms of a sequence.

(cricket, baseball) A group of matches between two sides, with the aim being to win more matches than the opposition.

(zoology) An unranked taxon.

(senseid) A subdivision of a genus, a taxonomic rank below that of section (and subsection) but above that of species.

Noun

(frequencies)

(uncountable) The rate of occurrence of anything; the relationship between incidence and time period.

* With growing confidence, the Viking’s raids increased in frequency .

* The frequency of bus service has been improved from 15 to 12 minutes.

(uncountable) The property of occurring often rather than infrequently.

* The FAQ addresses questions that come up with some frequency .

* The frequency of the visits was what annoyed him.

(countable) The quotient of the number of times $n$ a periodic phenomenon occurs over the time $t$ in which it occurs: $f\; =\; n\; /\; t$.

* The frequency of the musical note A above middle C is 440 oscillations per second.

* ''The frequency of a wave is its velocity $v$ divided by its wavelength $\backslash lambda$: $f\; =\; v\; /\; \backslash lambda$.

* Broadcasting live at a frequency of 98.3 megahertz, we’re your rock alternative!

* The frequency for electric power in the Americas is generally 60 Hz rather than 50.

(statistics) number of times an event occurred in an experiment (absolute frequency)