adherence vs heedlessness

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. 

heedlessness

noun
  • The state or character of being heedless 

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