blackball vs permit

blackball

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

  • 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. 

verb
  • To ostracize. 

  • To vote against, especially in an exclusive organization. 

permit

noun
  • An artifact or document rendering something allowed or legal. 

  • A pompano of the species Trachinotus falcatus. 

  • A learner's permit. 

verb
  • To allow (something) to happen, to give permission for. 

  • To allow for, to make something possible. 

  • To allow, to admit (of). 

  • To grant formal authorization for (something). 

  • To attempt to obtain or succeed in obtaining formal authorization for (something). 

  • To allow (someone) to do something; to give permission to. 

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