T-shirt vs sweater

T-shirt

noun
  • A lightweight shirt without buttons, usually with short sleeves and no collar. Often made of cotton and frequently bears a picture or slogan. 

sweater

noun
  • One who or that which causes to sweat. 

  • An exploitative middleman who subcontracted piece work in the tailoring trade. 

  • One who sweats (produces sweat). 

  • A similar garment worn for warmth. 

  • A knitted jacket or jersey, usually of thick wool, worn by athletes before or after exercise. 

  • A diaphoretic remedy. 

verb
  • To dress in a sweater. 

How often have the words T-shirt and sweater occurred in a corpus of books? (source: Google Ngram Viewer )