ideology vs postulate

ideology

noun
  • The study of the origin and nature of ideas. 

  • Doctrine, philosophy, body of beliefs or principles belonging to an individual or group. 

postulate

noun
  • An axiom. 

  • Something assumed without proof as being self-evident or generally accepted, especially when used as a basis for an argument. Sometimes distinguished from axioms as being relevant to a particular science or context, rather than universally true, and following from other axioms rather than being an absolute assumption. 

  • A requirement; a prerequisite. 

  • A fundamental element; a basic principle. 

verb
  • To appoint or request one's appointment to an ecclesiastical office. 

  • To assume as a truthful or accurate premise or axiom, especially as a basis of an argument. 

adj
  • Postulated. 

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