cynicism vs optimism

cynicism

noun
  • A distrustful attitude. 

  • An emotion of jaded negativity, or a general distrust of the integrity or professed motives of other people. Cynicism can manifest itself by frustration, disillusionment and distrust in regard to organizations, authorities and other aspects of society, often due to previous bad experience. Cynics often view others as motivated solely by disguised self-interest. 

  • A skeptical, scornful or pessimistic comment or act. 

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 

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