growler vs winter rat

growler

noun
  • A horse-drawn cab with four wheels. 

  • A fish of the perch family, abundant in North American rivers, so named from the sound it emits. 

  • A pork pie. 

  • A small iceberg or ice floe which is barely visible over the surface of the water. 

  • A kind of jug used to carry beer (in current usage, a 2-liter or 64-ounce container with or without a handle; sometimes extended to similarly shaped 32-ounce jug, but not bottles). 

  • A device for checking electrical equipment for short circuits etc. 

  • A person, creature or thing that growls. 

  • The vulva. 

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