conventionalist vs museum piece

conventionalist

adj
  • Of, pertaining to, or supporting conventionalism 

noun
  • A supporter or adherent of conventionalism. 

  • A person of conventional behaviour or beliefs. 

  • A member or supporter of the French National Convention. 

museum piece

noun
  • A very old item, especially an obsolete piece of technology. 

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