joy vs rainbows and unicorns

joy

noun
  • Luck or success; a positive outcome. 

  • Anything that causes such a feeling. 

  • A feeling of extreme happiness or cheerfulness, especially related to the acquisition or expectation of something good. 

verb
  • To feel joy, to rejoice. 

rainbows and unicorns

noun
  • A wonderful (but often unrealistic) scenario. 

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