hijacking vs pickpocket

hijacking

noun
  • The act of one who hijacks; the seizure of vehicles. 

  • The instance of such an act; the seizure of a vehicle. 

pickpocket

noun
  • One who steals from the pocket of a passerby, usually by sleight of hand. 

verb
  • To pick pockets; to steal. 

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