ambiguity vs positiveness

ambiguity

noun
  • words or statements that are open to more than one interpretation, explanation or meaning, especially if that meaning cannot be determined from its context. 

  • The state of being ambiguous. 

positiveness

noun
  • The result of being positive 

  • The quality of being positive; positivity. 

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