hijacker vs insurrectionary

hijacker

noun
  • Someone who hijacks. 

  • Hijackware. 

insurrectionary

noun
  • One who takes part in insurrection. 

adj
  • Pertaining to, or characterized by, insurrection. 

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