accessary vs replacement

accessary

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. 

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

replacement

noun
  • A person or thing that takes the place of another; a substitute. 

  • The removal of an edge of crystal, by one plane or more. 

  • The act of replacing something. 

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