legging vs thong

legging

noun
  • A covering, usually of leather, worn from knee to ankle. 

  • The process of putting a series of three or more options strikes into the stock market. 

  • One of the legs of a pair of trousers. 

  • Tight fitting leg coverings worn, for example, to gym. 

thong

noun
  • A strip of leather. 

  • The largest section of a bullwhip constructed of many straps of braided leather. 

  • An item of footwear, usually of rubber, secured by two straps which join to pass between the big toe and its neighbour. 

  • An undergarment or swimwear consisting of very narrow strips designed to cover just the genitals and nothing more. 

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