grafter vs hijacker

grafter

noun
  • A corrupt person, one who receives graft. 

  • An instrument by which grafting is facilitated. 

  • One who inserts scions on other stocks, or propagates fruit by engrafting. 

  • Someone who works in market stalls. 

  • a hard worker who puts in long hours 

  • The original tree from which a scion has been taken for grafting upon another tree. 

hijacker

noun
  • Someone who hijacks. 

  • Hijackware. 

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