cardinal number vs cardinality

cardinal number

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

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

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

cardinality

noun
  • The number of elements a given set contains. 

  • The number of terms that can inhabit a type; the possible values of a type. 

  • The status of being cardinalitial 

  • The property of a relationship between a database table and another one, specifying whether it is one-to-one, one-to-many, many-to-one, or many-to-many. 

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