disqualification vs incapacity

disqualification

noun
  • The act of disqualifying, or the state of being disqualified 

  • That which disqualifies; that which causes someone to be unfit for a certain purpose or role 

  • The act of being forbidden from further play in a basketball game due to the accumulation of too many personal fouls. 

incapacity

noun
  • Legal disqualification. 

  • The lack of a capacity; an inability. 

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