Frequency

# Frequency

WordNet

### noun

(1)   The number of observations in a given statistical category
(2)   The ratio of the number of observations in a statistical category to the total number of observations
(3)   The number of occurrences within a given time period
"The frequency of modulation was 40 cycles per second"
"The frequency of his seizures increased as he grew older"
Wiktonary

### Noun

1. 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.
2. 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.
3. 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 $\lambda$: $f = v / \lambda$.
• 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.