disinclination vs reluctance

disinclination

noun
  • The state of being disinclined; want of propensity, desire, or affection; slight aversion or dislike 

reluctance

noun
  • Unwillingness to do something. 

  • Hesitancy in taking some action. 

  • That property of a magnetic circuit analogous to resistance in an electric circuit. 

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