bailiwick vs magistracy

bailiwick

noun
  • A person's concern or sphere of operations, their area of skill or authority. 

  • The district within which a bailie or bailiff has jurisdiction. 

magistracy

noun
  • The dignity or office of a magistrate. 

  • The collective body of magistrates. 

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