presupposition vs theorisation

presupposition

noun
  • An assumption made beforehand; a preliminary conjecture or speculation. 

  • The act of presupposing. 

  • An assumption or belief implicit in an utterance or other use of language. 

theorisation

noun
  • Something theorised; a theory. 

  • The development of something beyond its obvious and practical scope. 

  • The act of constructing a theory. 

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