Frequency vs. Amplitude — What's the Difference?

Frequency is the number of occurrences of a repeating event per unit of time. It is also occasionally referred to as temporal frequency to emphasize the contrast to spatial frequency, and ordinary frequency to emphasize the contrast to angular frequency.

The amplitude of a periodic variable is a measure of its change in a single period (such as time or spatial period). There are various definitions of amplitude (see below), which are all functions of the magnitude of the differences between the variable's extreme values.

The rate at which something occurs over a particular period of time or in a given sample

Greatness of size; magnitude.

The rate per second of a vibration constituting a wave, either in a material (as in sound waves), or in an electromagnetic field (as in radio waves and light)

Fullness; copiousness.

The property or condition of occurring at frequent intervals.

Breadth or range, as of intelligence.

The number of repetitions of a complete sequence of values of a periodic function per unit variation of an independent variable.

(Astronomy) The angular distance along the horizon from true east or west to the intersection of the vertical circle of a celestial body with the horizon.

The number of complete cycles of a periodic process occurring per unit time.

(Physics) The maximum absolute value of a periodically varying quantity.

The number of repetitions per unit time of a complete waveform, as of an electric current.

The maximum absolute value of a periodic curve measured along its vertical axis.

The number of measurements or observations having a certain value or characteristic.

The angle made with the positive horizontal axis by the vector representation of a complex number.

See relative frequency.

(Electronics) The maximum absolute value reached by a voltage or current waveform.

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

The measure of something's size, especially in terms of width or breadth; largeness, magnitude.

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

(mathematics) The maximum absolute value of the vertical component of a curve or function, especially one that is periodic.

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

(physics) The maximum absolute value of some quantity that varies.

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

(astronomy) The arc of the horizon between the true east or west point and the center of the sun, or a star, at its rising or setting. At the rising, the amplitude is eastern or ortive: at the setting, it is western, occiduous, or occasive. It is also northern or southern, when north or south of the equator.

The condition of returning frequently; occurrence often repeated; common occurence; as, the frequency of crimes; the frequency of miracles.

(astronomy) The arc of the horizon between the true east or west point and the foot of the vertical circle passing through any star or object.

A crowd; a throng.

(firearms) The horizontal line which measures the distance to which a projectile is thrown; the range.

The number of occurrences within a given time period (usually 1 second);

State of being ample; extent of surface or space; largeness of dimensions; size.

The ratio of the number of observations in a statistical category to the total number of observations

Largeness, in a figurative sense; breadth; abundance; fullness.

The number of observations in a given statistical category

The arc of the horizon between the true east or west point and the center of the sun, or a star, at its rising or setting. At the rising, the amplitude is eastern or ortive: at the setting, it is western, occiduous, or occasive. It is also northern or southern, when north or south of the equator.

The horizontal line which measures the distance to which a projectile is thrown; the range.

The extent of a movement measured from the starting point or position of equilibrium; - applied especially to vibratory movements.

An angle upon which the value of some function depends; - a term used more especially in connection with elliptic functions.

(physics) the maximum displacement of a periodic wave

The property of copious abundance

Greatness of magnitude