Definition of frequency
1 : the fact or condition of occurring frequently the frequency of automobile accidents
2a : the number of times that a periodic function repeats the same sequence of values during a unit variation of the independent variableb : the number, proportion, or percentage of items in a particular category in a set of data
3 : the number of repetitions of a periodic process in a unit of time: such asa : the number of complete alternations (see alternation 1) per second of an alternating currentb : the number of complete oscillations (see oscillation 3) per second of energy (such as sound or electromagnetic radiation) in the form of waves
Examples of frequency in a sentence
the alarming frequency of serious automobile accidents caused by young drivers
The frequency of student errors was frustrating to the young teacher.
Our visits decreased in frequency.
Errors were occurring with increasing frequency.
a sound wave of high frequency
waves having very different frequencies from one another
a current having a frequency of 60 hertz
a radio frequency of 30 megahertz
First Known Use of frequency
FREQUENCY Defined for Kids
Definition of frequency for Students
1 : frequent repetition Rain fell with frequency.
2 : rate of repetition She went with increasing frequency.
3 : the number of waves of sound or energy that pass by a point every second Tune the stereo to receive a specific frequency of radio waves.
Medical Definition of frequency
1: the number of individuals in a single class when objects are classified according to variations in a set of one or more specified attributes
2: the number of repetitions of a periodic process in a unit of time
Seen and Heard
What made you want to look up frequency? Please tell us where you read or heard it (including the quote, if possible).