conventionalism vs purism

conventionalism

noun
  • Adherence to social conventions; conventional behavior. 

  • The doctrine that logical or mathematical principles are simply the expression of conventions. 

purism

noun
  • An insistence on the traditionally correct way of doing things. 

  • An example of purist language etc. 

  • The desire to use words and forms derived from what is considered the native element in a given language instead of elements considered borrowed or foreign. 

  • An insistence on pure or unmixed forms. 

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