chaperon vs groomsman

chaperon

noun
  • An adult who accompanies or supervises one or more young, unmarried men or women during social occasions, usually with the specific intent of preventing some types of social or sexual interactions or illegal behavior. 

  • A device placed on the foreheads of horses which draw the hearse in pompous funerals. 

  • A type of hood, often ornamental or official, with an attached cape and a tail, later worn as a hat with the face hole put over the top of the head instead. 

verb
  • To accompany; to escort. 

  • To mother. 

groomsman

noun
  • A man who serves as one of a number of attendants to a bridegroom at a wedding, one of whom is the best man. 

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