beat someone's brains out vs beat up

beat someone's brains out

verb
  • To beat someone very severely. 

beat up

verb
  • To give a severe beating to; to assault violently with repeated blows. 

  • To cause, by some other means, injuries comparable to the result of being beaten up. 

  • To feel badly guilty and accuse oneself over something. (Usually followed by over or about.) 

  • To repeatedly bomb a military target or targets. 

  • To get something done (derived from the idea of beating for game). 

  • To sail to windward using a series of alternate tacks across the wind. 

noun
  • A raid. 

  • A tree planted later than others in a plantation. 

  • A person who, or thing that, has been beaten up. 

  • An artificially or disingenuously manufactured alarm or outcry, especially one agitated by or through the media. 

  • A beating; a hazing. 

adj
  • Battered by time and usage; beaten up. 

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