mob rule vs obedience

mob rule

noun
  • Government by violent gangs, or by the masses. 

obedience

noun
  • The collective body of persons subject to any particular authority. 

  • A written instruction from the superior of an order to those under him. 

  • Any official position under an abbot's jurisdiction. 

  • The quality of being obedient. 

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