sheets vs sleet

sheets

noun
  • Collective noun meaning a large amount, when used of rain, or other precipitation. 

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. 

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