accessary vs spin-off

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. 

spin-off

noun
  • An incidental benefit or unexpected pay-off. 

  • An offshoot. 

  • A fictional work where the protagonist was introduced in a preceding work or at least shares the same setting, often in a different aspect. 

  • By-product. 

  • The formation of a subsidiary company that continues the operations of part of the parent company; the company so formed. 

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