mugger vs raider

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. 

raider

noun
  • One who engages in a raid; a plunderer. 

  • A warship which is light, maneuverable, and fast-moving. 

  • A law enforcement official who conducts a raid on a building in search for illicit goods. 

  • A person who uncovers evidence of improper behavior within governmental or private organizations. 

  • A person who takes or attempts to take control of a firm against the will of current management by purchasing a controlling interest of stock and acquiring proxies. 

  • A special forces operative; a commando. 

  • A warplane on an air raid. 

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