buggy vs winter rat

buggy

noun
  • A small motor vehicle, such as a dune buggy. 

  • A hearse. 

  • A small horse-drawn cart. 

  • A pushchair; a stroller. 

  • A shopping cart or trolley. 

adj
  • Crazy; bughouse. 

  • Containing programming errors. 

  • Resembling an insect. 

  • Infested with insects. 

winter rat

noun
  • An old, unattractive automobile, purchased for little money, to be driven during brutal Great Lakes winters while the owner's "good" car remains garaged and protected from corrosive road salt for the season. 

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