Frequency is influenced by sampling rate and measured in:

Frequency is a measure of how often a repeating event occurs over a given period of time. In the context of digital instrumentation and signal processing, frequency is typically expressed in hertz. One hertz equates to one cycle per second, which provides a clear and standardized way to quantify the number of cycles of a waveform that occur in one second.

When discussing the relationship between frequency and sampling rate, it is critical to note that the sampling rate must be at least double the highest frequency present in the signal to accurately capture the waveform, as dictated by the Nyquist theorem. This emphasis on hertz for frequency makes it integral to understanding how signals are measured and analyzed in digital systems.

Other units, such as microvolts, measure electrical potential and millimeters measure distance—both of which do not relate to frequency. Cycles per second is indeed equivalent to hertz; however, using the standardized term hertz is more common and clear in scientific and technical contexts. Therefore, expressing frequency in hertz is not only precise but also aligns with the conventions of electrical engineering and signal processing.