The frequency of a guitar note can be determined by measuring the number of vibrations per second. This frequency is represented as a continuous value because it can vary smoothly across a range of pitches.
To answer this properly more context is needed but frequency is in most contexts continuous.
The two main kinds are discrete and continuous.
The frequency domain of a voice signal is normally continuous because voice is a nonperiodic signal.
In signal processing, sampling is the reduction of a continuous signal to a discrete signal. A common example is the conversion of a sound wave (a continuous signal) to a sequence of samples (a discrete-time signal).
Some manufacturing is discrete, some continuous.
ocean depth is a continuous or discrete variable?
continuous discrete
Continuous.
Continuous
Continuous
discrete
discrete