numeration

 
Pronunciation: /njuːməˈreɪʃ(ə)n/

noun

[mass noun]
  • the action or process of calculating or assigning a number to something.
  • [count noun] a method or process of numbering, counting, or computing.

Origin:

late Middle English: from Latin numeratio(n-) 'payment' (in late Latin 'numbering'), from the verb numerare 'to number'