amiability vs extroversion

amiability

noun
  • Friendliness, especially easy approachability owing to a cheerful and pleasant disposition. 

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 amiability and extroversion occurred in a corpus of books? (source: Google Ngram Viewer )