capability vs sickliness

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. 

sickliness

noun
  • The state or characteristic of weakness, incapacity, or physical distress due to poor health, especially of a chronic nature. 

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