blow away vs do away with

blow away

verb
  • To kill (someone) by shooting them with a firearm. 

  • To disperse or to depart on currents of air. 

  • Used other than figuratively or idiomatically: see blow, away. 

  • To overwhelm. 

  • To cause to go away by blowing, or by wind. 

  • To cause to go away, to get rid of 

  • To flabbergast; to impress greatly. 

  • To delete (data, files, etc.). 

do away with

verb
  • To have someone killed. 

  • To abolish; to put an end to; to eliminate. 

How often have the words blow away and do away with occurred in a corpus of books? (source: Google Ngram Viewer )