frag vs take care of

frag

verb
  • To kill. 

  • To hit with the explosion of a fragmentation grenade. 

  • To deliberately kill (one's superior officer) with a fragmentation grenade. 

  • I fragged him but he fell off the ledge afterwards. 

noun
  • A successful kill in a deathmatch game. 

  • A fragmentation grenade. 

take care of

verb
  • To kill. 

  • To deal with, handle. 

  • To look after, to provide care for. 

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