debar vs disallow

debar

verb
  • To hinder or prevent. 

  • To exclude or shut out; to bar. 

  • To prohibit (a person or company that has been convicted of criminal acts in connection with a government program) from future participation in that program. 

disallow

verb
  • To reject as invalid, untrue, or improper 

  • to overrule a colonial legislation by the sovereign-in-privy council 

  • To refuse to allow 

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