approachability vs extroversion

approachability

noun
  • The characteristic of being approachable; the ability to be approached. 

extroversion

noun
  • A personality orientation towards others and things outside oneself; behavior expressing such orientation. 

  • The condition of being inside out, especially in relation to the bladder. 

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