pickpocket vs scummer

pickpocket

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

verb
  • To pick pockets; to steal. 

scummer

noun
  • One who engages in scumming. 

  • excrement, scumber 

  • An instrument for taking off scum 

  • A supporter of Southampton F.C.. 

verb
  • scumber 

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