amount vs cardinal number

amount

noun
  • A quantity or volume. 

  • The number (the sum) of elements in a set. 

  • The total, aggregate or sum of material (not applicable to discrete numbers or units or items in standard English). 

verb
  • To be the same as or equivalent to. 

  • To total or evaluate. 

cardinal number

noun
  • A word that expresses a countable quantity; a cardinal numeral. 

  • A generalized kind of number used to denote the size of a set, including infinite sets. 

  • A number used to denote quantity; a counting number; a cardinal. 

How often have the words amount and cardinal number occurred in a corpus of books? (source: Google Ngram Viewer )