ice cube vs ice floe

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. 

ice floe

noun
  • A flat mass of floating ice, smaller than an ice field. 

  • An ice dam (ice jam), a blockage of ice in a river starting with an ice floe in the river. 

  • Any type of sea ice not attached to land, drift ice. 

  • An ice stream (ice flow), a type of fast moving glacier 

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