decision vs doubtfulness

decision

verb
  • To defeat an opponent by a decision of the judges, rather than by a knockout 

noun
  • A result arrived at by the judges when there is no clear winner at the end of the contest. 

  • Firmness of conviction. 

  • A choice or judgement. 

  • A win or a loss awarded to a pitcher. 

  • The act of deciding. 

doubtfulness

noun
  • The state or quality of being doubtful; doubt; uncertainty. 

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