cardigan vs pullover

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. 

pullover

noun
  • A sweater that must be put on by pulling it over the head; a sweater without buttons or a zipper in front 

  • An exercise performed lying on the back in which the arms are extended behind the head and exertion lifts the weight above the head. 

  • An exercise in which the gymnast pulls up from a hang lifting the legs up and over the bar thus rolling into a support position. 

  • An instance of a vehicle being pulled over. 

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