disbelief vs understanding

disbelief

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

  • Astonishment. 

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

understanding

noun
  • Reason or intelligence, ability to grasp the full meaning of knowledge, ability to infer. 

  • Opinion, judgement or outlook. 

  • An informal contract; mutual agreement. 

  • A reconciliation of differences. 

  • The act of one that understands or comprehends; comprehension; knowledge; discernment. 

  • Sympathy. 

adj
  • Showing compassion, tolerance, and forbearance. 

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