celibacy vs ego

celibacy

noun
  • Abstinence from sexual relations. 

  • Abstaining from marriage; the state of being unmarried. 

ego

noun
  • The most central part of the mind, which mediates with one's surroundings. 

  • The self, especially with a sense of self-importance. 

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