black tie vs tuxedo

black tie

noun
  • A black bow tie worn with a dinner jacket. 

  • Used other than figuratively or idiomatically: see black, tie. 

  • Evening dress; a standard of dress which is less formal than white tie, consisting of black dinner jacket or tuxedo jacket, and matching trousers, white shirt and black bow tie or, possibly, military dress or national costume. 

tuxedo

noun
  • A typically black formal jacket worn by men. 

  • The entire suit complementing and including this jacket. 

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