egotism vs introversion

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. 

introversion

noun
  • A personality orientation towards the self and mental abstraction; behavior expressing such orientation. 

  • Arrangement of two similar words, lines, etc. to form the middle part of a structure. 

  • The action of turning one's thoughts upon internal or spiritual matters. 

  • A turning inward 

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