boiler suit vs tuxedo

boiler suit

noun
  • A one-piece suit combining trousers and jacket, worn for heavy or hot manual labour. 

tuxedo

noun
  • The entire suit complementing and including this jacket. 

  • A typically black formal jacket worn by men. 

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