T-shirt vs footwear

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. 

footwear

noun
  • Items or an item of clothing that is worn on the foot; a shoe, sandal, etc. 

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