mugger vs stealer

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. 

stealer

noun
  • One who steals; a thief. 

  • a child-stealer; a chicken-stealer 

  • The endmost plank of a strake which stops short of the stem or stern. 

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