impracticable vs unappropriate

impracticable

adj
  • impassable 

  • not practicable; impossible or difficult in practice 

unappropriate

adj
  • Inappropriate; unsuitable. 

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

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