cupbearer vs equerry

cupbearer

noun
  • One who ceremonially fills and hands out the cups in which a drink is served. 

equerry

noun
  • An officer responsible for the care and supervision of the horses of a person of rank. 

  • A personal attendant to a head of state, a member of a royal family, or a national representative. 

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