ambivalence vs vagueness

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. 

vagueness

noun
  • The condition of being unclear; vague. 

  • Something which is vague, or an instance or example of vagueness. 

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