bright side vs pessimism

bright side

noun
  • A consoling aspect of a difficult situation. 

pessimism

noun
  • A general belief that bad things will happen. 

  • The condition of being pessimal. 

  • The doctrine that this world is the worst of all possible worlds. 

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