optimism vs renunciation

optimism

noun
  • the doctrine that this world is the best of all possible worlds 

  • a tendency to expect the best, or at least, a favourable outcome 

  • the belief that good will eventually triumph over evil 

renunciation

noun
  • The resignation of an ecclesiastical office. 

  • In the Anglican baptismal service, the part in which the candidate in person or by his sureties renounces the Devil and all his works. 

  • The act of rejecting or renouncing something as invalid. 

  • The act by which a person abandons a right acquired, but without transferring it to another. 

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