cannonade vs rain

cannonade

noun
  • A loud noise like a cannonade; a booming. 

  • The firing of artillery for a length of time. 

verb
  • To discharge artillery fire upon. 

rain

noun
  • An instance of particles or larger pieces of matter moving or falling through air. 

  • Any matter moving or falling, usually through air, and especially if liquid or otherwise figuratively identifiable with raindrops. 

  • Condensed water falling from a cloud. 

verb
  • To have rain fall from the sky. 

  • To fall as or like rain. 

  • To issue (something) in large quantities. 

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