accessary vs assistant

accessary

adj
  • Accompanying as a subordinate; additional; accessory; especially, uniting in, or contributing to, a crime, but not as chief actor. See accessory. 

noun
  • Someone who accedes to some act, now especially a crime; one who contributes as an assistant or instigator to the commission of an offense. 

assistant

adj
  • Having a subordinate or auxiliary position. 

  • Helping; lending aid or support; auxiliary. 

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

  • Sales assistant. 

  • A person who assists or helps someone else. 

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