genitive case vs possessive

genitive case

noun
  • Noun case used to express some relationship such as possession or origin. It corresponds roughly to the English preposition “of” and the suffix “-'s”. 

possessive

noun
  • A word used to indicate the possessive case. 

  • The possessive case. 

adj
  • Of or pertaining to ownership or possession. 

  • Unwilling to yield possession of. 

  • Indicating ownership, possession, origin, etc. 

How often have the words genitive case and possessive occurred in a corpus of books? (source: Google Ngram Viewer )