unable vs unlivable

unable

adj
  • Not able; lacking a certain ability. 

verb
  • To render unable; to disable. 

intj
  • Indicating that a requested course of action is not possible to carry out. 

unlivable

adj
  • Unfit to be lived in; uninhabitable. 

  • That cannot be lived. 

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