insufficient vs unappropriate

insufficient

adj
  • Not sufficient; of a type or kind that does not suffice, that does not satisfy requirements or needs. 

  • Not sufficient; lacking competent power or ability; unqualified, unequal, unfit. 

det
  • An inadequate quantity of; not enough. 

  • A quantity (of something) that is less than is needed. 

unappropriate

adj
  • Inappropriate; unsuitable. 

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

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