egocentrism vs egoism

egocentrism

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

egoism

noun
  • Egotism (tendency to talk excessively about oneself). 

  • The tendency to think selfishly with exclusive self-interest in mind. 

  • The belief that moral behavior should be directed toward one's self-interest only. 

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