conventionalist vs sobersides

conventionalist

noun
  • A person of conventional behaviour or beliefs. 

  • A supporter or adherent of conventionalism. 

  • A member or supporter of the French National Convention. 

adj
  • Of, pertaining to, or supporting conventionalism 

sobersides

noun
  • A serious and sedate person 

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