fur coat vs winter coat

fur coat

noun
  • The fur of an animal; the animal coat of its own fur. 

  • An outer garment for the upper body made of furry animal hides. 

winter coat

noun
  • An animal's seasonal appearance in winter, notably thicker and/or otherwise camouflaged plumage or fur after (often autumnal) moulting 

  • A warm coat, often an overcoat, fit to be worn in winter 

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