sleet vs snow shower

sleet

noun
  • 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. 

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

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

snow shower

noun
  • A short duration of moderate snowfall. Some accumulation is possible. 

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