filch vs pickpocket

filch

verb
  • To illegally take possession of (something, especially items of low value); to pilfer, to steal. 

noun
  • Something which has been filched or stolen. 

  • An act of filching; larceny, theft. 

pickpocket

verb
  • To pick pockets; to steal. 

noun
  • One who steals from the pocket of a passerby, usually by sleight of hand. 

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