beat someone's brains out vs butcher

beat someone's brains out

verb
  • To beat someone very severely. 

butcher

verb
  • To kill brutally. 

  • To ruin (something), often to the point of defamation. 

  • To work as a butcher. 

  • To slaughter (animals) and prepare (meat) for market. 

  • To mess up hopelessly; to botch. 

noun
  • A look. 

  • A brutal or indiscriminate killer. 

  • A person who prepares and sells meat (and sometimes also slaughters the animals). 

How often have the words beat someone's brains out and butcher occurred in a corpus of books? (source: Google Ngram Viewer )