adherence vs obedience

adherence

noun
  • Faithful support for some cause. 

  • An extent to which a patient continues an agreed treatment plan. 

  • The fulfilment of the legal obligation of residing with wife or husband. 

  • A close physical union of two objects. 

obedience

noun
  • The quality of being obedient. 

  • 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. 

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