inexactness vs sureness

inexactness

noun
  • The characteristic or quality of being inexact; a lack of precision, accuracy, or certainty. 

sureness

noun
  • The property of being sure, deft, confident of ability. 

  • The property of being sure, certainty. 

  • The result or product of being sure. 

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