egotism vs extroversion

egotism

noun
  • Egoism (belief that behavior should be directed towards one's self-interest). 

  • A belief that one is superior to or more important than others. 

  • The result or product of being egoistic. 

  • A tendency to talk excessively about oneself. 

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