glacier vs ice cube

glacier

noun
  • A large body of ice which flows under its own mass, usually downhill. 

ice cube

noun
  • Any small piece of ice used for cooling drinks, larger than crushed ice, regardless of their shape. 

  • Used other than figuratively or idiomatically: see ice, cube. 

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