disbelief vs heresy

disbelief

noun
  • The loss or abandonment of a belief; cessation of belief. 

  • Astonishment. 

  • Unpreparedness, unwillingness, or inability to believe that something is the case. 

heresy

noun
  • a doctrine held by a member of a religion at variance with established religious beliefs 

  • A controversial or unorthodox opinion held by a member of a group, as in politics, philosophy or science. 

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