egocentrism vs extroversion

egocentrism

noun
  • The constant following of one's egotistical desires to an extreme. 

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