Numeration (noun)

1. The act of counting or calculating numbers.
2. The system of representing numbers in a particular way.

Origin:

Late 16th century: from latin numeratio(n-), from numerare "to count".

Examples:

1. The numeration of the ancient Mayans was based on the number 20.
2. This numeration system uses base 10.
3. The numeration of binary code uses only two symbols, 0 and 1.
4. The process of numeration is a crucial part of mathematics.
5. The numeration of Roman numerals was used in ancient Rome.