decision vs fluctuation

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. 

fluctuation

noun
  • A wavering; unsteadiness. 

  • In medicine, a wave-like motion or undulation of a fluid in a natural or abnormal cavity (e.g. pus in an abscess), which is felt during palpation or percussion. 

  • A motion like that of waves; a moving in this and that direction. 

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