bump off vs eliminate

bump off

verb
  • To kill, especially to murder. 

  • To cut class; to play truant. 

eliminate

verb
  • To kill (a person or animal). 

  • To exclude (from investigation or from further competition). 

  • To completely remove, get rid of, put an end to. 

  • To record amounts in a consolidation statement to remove the effects of inter-company transactions. 

  • To excrete (waste products). 

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