ineffectual vs unappropriate

ineffectual

adj
  • Worthless; ineffective. 

  • Unable or insufficient to produce effect. 

  • Weak, indecisive; lacking forcefulness. 

unappropriate

adj
  • Inappropriate; unsuitable. 

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

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