blackball vs permission

blackball

noun
  • A rejection; a vote against admitting someone. 

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

  • 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. 

verb
  • To ostracize. 

  • To vote against, especially in an exclusive organization. 

permission

noun
  • authorisation; consent (especially formal consent from someone in authority) 

  • The act of permitting. 

  • Flags or access control lists pertaining to a file that dictate who can access it, and how. 

verb
  • To grant or obtain authorization for. 

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