monokini vs nut huggers

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). 

nut huggers

noun
  • Men's swimming briefs, tight-fitting jeans or similar, especially tight, lower-body garments. 

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