unable vs unappropriate

unable

adj
  • Not able; lacking a certain ability. 

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

verb
  • To render unable; to disable. 

unappropriate

adj
  • Inappropriate; unsuitable. 

verb
  • To take from private possession; to restore to the possession or right of all. 

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