dress suit vs evening dress

dress suit

noun
  • A type of formal attire for women, typically a jacket over a dress, or a jacket and blouse with trousers or a skirt. 

  • A type of formal attire for men, normally consisting of a jacket (traditionally with tails), trousers, waistcoat, shirt and tie (traditionally a bow tie). 

evening dress

noun
  • An elegant dress worn by women, especially for social events in the evening, an evening gown. 

  • formal attire worn for evening social events. 

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