mugger vs terrorist

mugger

noun
  • A person who assaults and robs others, especially in a public place. 

  • A large crocodile, Crocodylus palustris, of southwest Asia, having a very broad wrinkled snout. 

  • A person who makes exaggerated faces, as a performance; a gurner. 

terrorist

noun
  • A person, group, or organization that uses violent action, or the threat of violent action, to further political goals. 

  • An agent or partisan of the revolutionary tribunal during the Reign of Terror in France. 

adj
  • Of or relating to terrorism. 

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