knitwear vs singlet

knitwear

noun
  • knitted garments 

singlet

noun
  • A one-piece, tight-fitting uniform, usually made of spandex or nylon, required in wrestling and powerlifting. 

  • A person who does not have a form of multiplicity, i.e. a single persona occupying one human body. 

  • A multiplet having a single member, especially a single spectroscopic peak. 

  • A quantum state having zero spin. 

  • A sleeveless buttonless shirt with a low-cut neck. 

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