stated vs unspecified

stated

adj
  • Settled; established; fixed. 

  • Expressed in a statement; uttered or written. 

  • Recurring at a regular time; not occasional. 

unspecified

adj
  • Not specified; not thoroughly explained or detailed; not adequately commented. 

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