mugging vs pickpocket

mugging

noun
  • A quick violent robbery of a person, usually in a public place. 

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 mugging and pickpocket occurred in a corpus of books? (source: Google Ngram Viewer )