hoar frost vs snow

hoar frost

noun
  • Water vapour which has undergone deposition or desublimation (“transformation directly into ice crystals without first turning into liquid water”) when the air is cold and moist to form a white deposit on exposed surfaces. 

  • Originally, any frozen dew forming a white deposit on exposed surfaces. 

snow

noun
  • The frozen, crystalline state of water that falls as precipitation. 

  • The moving pattern of random dots displayed on a television, etc., when no transmission signal is being received. 

  • marine snow 

  • A square-rigged vessel, differing from a brig only in that she has a trysail mast close abaft the mainmast, on which a large trysail is hoisted. 

  • A snowfall; a blanket of frozen, crystalline water. 

  • Cocaine. 

  • Any similar frozen form of a gas or liquid. 

  • A shade of the color white. 

verb
  • To hoodwink someone, especially by presenting confusing information. 

  • To bluff in draw poker by refusing to draw any cards. 

  • To have snow fall from the sky. 

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