ambivalence vs certainty

ambivalence

noun
  • A state of uncertainty or indecisiveness. 

  • The coexistence of opposing attitudes or feelings (such as love and hate) towards a person, object or idea. 

certainty

noun
  • An instance of being certain. 

  • The state of being certain. 

  • A fact or truth unquestionably established. 

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