adherence vs stability

adherence

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

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

  • Faithful support for some cause. 

  • A close physical union of two objects. 

stability

noun
  • The condition of being stable or in equilibrium, and thus resistant to change. 

  • The tendency to recover from perturbations. 

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