blackball vs disallow

blackball

verb
  • To vote against, especially in an exclusive organization. 

  • To ostracize. 

noun
  • A black ball used to indicate such a negative vote. 

  • A rejection; a vote against admitting someone. 

  • A kind of large black sweet; a niggerball. 

  • A game, a standardized version of the English version of eight-ball. 

  • A substance for blacking shoes, boots, etc. or for taking impressions of engraved work. 

disallow

verb
  • To refuse to allow 

  • To reject as invalid, untrue, or improper 

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

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