aide-de-camp vs attendant

aide-de-camp

noun
  • A military officer who serves as an adjutant to a higher-ranking officer, prince or other high political dignitary. 

attendant

noun
  • One who owes a duty or service to another. 

  • One who attends; one who works with or watches over something. 

  • That which accompanies or follows. 

  • A servant or valet. 

adj
  • Depending on, or owing duty or service to. 

  • Going with; associated; concomitant. 

How often have the words aide-de-camp and attendant occurred in a corpus of books? (source: Google Ngram Viewer )