expectancy vs sunshine and rainbows

expectancy

noun
  • Expectation or anticipation; the state of expecting something. 

  • The state of being expected. 

  • Future interest as to possession or enjoyment 

sunshine and rainbows

noun
  • Happy, positive things, sometimes with a connotation of unrealistic expectations. 

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