schooner vs winter rat

schooner

noun
  • A covered wagon used by emigrants. 

  • A glass for drinking a large measure of sherry. 

  • A sailing ship with two or more masts, all with fore-and-aft sails; if two masted, having a foremast and a mainmast. 

  • A large goblet or drinking glass, used for lager or ale (Wikipedia). 

  • A glass of beer, of a size which varies between states (Wikipedia). 

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 schooner and winter rat occurred in a corpus of books? (source: Google Ngram Viewer )