hajduk vs mobster

hajduk

noun
  • An outlaw, highwayman, or freedom fighter in the Balkans. 

  • A halberdier of a Hungarian noble. 

  • An attendant in German or Hungarian courts. 

mobster

noun
  • A member of a mob or Mafia. 

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