assailant vs mugger

assailant

noun
  • Someone who attacks or assails another violently, or criminally. 

  • A hostile critic or opponent. 

adj
  • Assailing; attacking. 

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. 

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