You might be referring to mathematical measure theory.
Probability is a measure. So if I said that the probability of getting 1, 3 or 5 rolling a single die is 1/2 then that probability would be the measure of the composite event consisting of the three possible outcomes 1, 3 and 5.
a way to describe the world in numbers is measurement...
The term used to describe the reproducibility of a measurement is "reliability." It refers to the consistency and stability of a measurement when it is repeated under similar conditions.
Describe the sequence of events that enable us to hear
liter
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pangit!
measurement
millimetre
Measurement 1: Latitude Measurement 2: Longitude
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Horsepower
Measurement describes world using numbers.