tepid vs unsociable

tepid

adj
  • Uninterested; exhibiting little passion or eagerness; lukewarm. 

  • Lukewarm; neither warm nor cool. 

unsociable

adj
  • unfriendly 

  • not congenial or compatible 

  • not desiring the company of others 

noun
  • A person who is not sociable. 

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