aide-de-camp vs assistant

aide-de-camp

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

assistant

noun
  • A person who assists or helps someone else. 

  • A software tool that provides assistance in some task, a wizard program. 

  • Sales assistant. 

adj
  • Helping; lending aid or support; auxiliary. 

  • Having a subordinate or auxiliary position. 

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