cardigan vs overcoat

cardigan

noun
  • A type of sweater or jumper that fastens up the front with buttons or a zipper, usually machine- or hand-knitted from wool. 

overcoat

noun
  • A heavy garment worn over other clothes, for protection from cold or weather. 

verb
  • To apply an exterior coating to. 

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