assistant vs auxiliary

assistant

adj
  • Helping; lending aid or support; auxiliary. 

  • Having a subordinate or auxiliary position. 

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

  • Sales assistant. 

  • A person who assists or helps someone else. 

auxiliary

adj
  • Helping; giving assistance or support. 

  • Supplementary or subsidiary. 

  • Held in reserve for exceptional circumstances. 

  • Of a ship, having both sails and an engine. 

  • Relating to an auxiliary verb. 

noun
  • A person or group that acts in an auxiliary manner. 

  • An auxiliary verb. 

  • A marching band colorguard. 

  • A sailing vessel equipped with an engine. 

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