frock vs winter coat

frock

noun
  • An undress regimental coat. 

  • An outer garment worn by priests and other clericals; a habit. 

  • A sailor's jersey. 

  • A frog. 

  • A dress, a piece of clothing, which consists of a skirt and a cover for the upper body. 

verb
  • To make (somebody) a cleric. 

  • To clothe (somebody) in a frock. 

  • To grant to an officer the title and uniform of a rank he will soon be promoted to. 

winter coat

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

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

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