monokini vs swimwear

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). 

swimwear

noun
  • Items of clothing appropriate for swimming 

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