frosting vs sleet

frosting

noun
  • A layer of frost. 

  • Icing, a sweet, often creamy and thick, covering for cakes and other baked goods. 

  • The theft of a car while it is left unattended, especially when its engine is left running in the winter to defrost the car. 

sleet

noun
  • A smooth coating of ice formed on ground or other objects by freezing rain. 

  • Precipitation in the form of a mixture of rain and snow. 

  • Part of a mortar extending from the chamber to the trunnions. 

  • Pellets of ice made of mostly frozen raindrops or refrozen melted snowflakes. 

verb
  • To be in a state in which sleet is falling. 

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