inept vs unappropriate

inept

adj
  • Unfit; unsuitable. 

  • Not able to do something; not proficient; displaying incompetence. 

unappropriate

adj
  • Inappropriate; unsuitable. 

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

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