gown vs white tie

gown

noun
  • Any sort of dress or garb. 

  • A loose wrapper worn by gentlemen within doors; a dressing gown. 

  • The robe worn by a surgeon. 

  • A woman's ordinary outer dress, such as a calico or silk gown. 

  • The university community, especially as contrasted with the local populace. 

  • A loose, flowing upper garment. 

  • The official robe of certain professionals, clerics, and scholars, such as university students and officers, barristers, judges, etc. 

  • The dress of civil officers, as opposed to military officers. 

verb
  • To dress in a gown, to don or garb with a gown. 

white tie

noun
  • The most formal kind of eveningwear for men, consisting of an evening tailcoat, trousers with strips of braid down the side seams, white stiff-fronted shirt, white bow tie and waistcoat with or without sash. 

  • A dress code specifying white tie for men and ball gown or evening dress for women, or, alternatively, full military dress or national costume. 

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