capability vs decrepitude

capability

noun
  • the power or ability to generate an outcome 

  • A digital token allowing a user or process to interact in a specified way with an object that is subject to access control. 

decrepitude

noun
  • the state of being decrepit or worn out from age or long use 

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