conviction vs dubiousness

conviction

noun
  • A judgement of guilt in a court of law. 

  • The state of being wholly convinced. 

  • A firmly held belief. 

  • The state of being found or proved guilty. 

dubiousness

noun
  • The state of being dubious. 

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