Measurement Of Time | Encyclopedia.com
https://www.encyclopedia.com/science-and-technology/mathematics/mathematics/measurement-time
Time is measured with instruments such as a clock or calendar. These instruments can be anything that exhibits two basic components: (1) a regular, constant, or repetitive action to mark off equal increments of time, and (2) a means of keeping track of the increments of time and of displaying the result. See more
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