monokini vs thong

monokini

noun
  • A one-piece swimsuit, which may cover both the chest and the crotch (as contrasted with a bikini, which consists of two pieces). 

  • The lower part of a bikini without the upper part (i.e., topless). 

thong

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

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

  • A strip of leather. 

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

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