blackball vs throw out

blackball

verb
  • To ostracize. 

  • To vote against, especially in an exclusive organization. 

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. 

throw out

verb
  • To discard; to dispense with something; to throw away. 

  • To offer an idea for consideration. 

  • To dismiss or expel someone from any longer performing duty or attending somewhere. 

  • To produce in a haphazard fashion. 

  • To emit. 

  • To cause or experience debilitating muscle or joint pain in (a body part). 

  • To put into a state of confusion. 

  • To cause to project. 

  • To utter carelessly. 

  • To outdistance; to leave behind. 

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