gratuitous vs unappropriate

gratuitous

adj
  • Unjustified or unnecessary; not called for by the circumstances. 

  • Given freely; unearned. 

unappropriate

adj
  • Inappropriate; unsuitable. 

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

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