monokini vs togs

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). 

togs

noun
  • Swimsuits, of either the women's or men's tight-fitting type (in some regions referred to as "speedos"). 

  • Clothes for a specific occasion or use. 

  • Clothes. 

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