expectancy vs page-turner

expectancy

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

  • The state of being expected. 

  • Future interest as to possession or enjoyment 

page-turner

noun
  • A written work, usually a novel, which is sufficiently interesting or suspenseful to keep the reader 'turning the pages'. 

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