blow away vs hit like a ton of bricks

blow away

verb
  • To cause to go away, to get rid of 

  • 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 flabbergast; to impress greatly. 

  • To delete (data, files, etc.). 

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

hit like a ton of bricks

verb
  • To have a sudden and significant impact. 

How often have the words blow away and hit like a ton of bricks occurred in a corpus of books? (source: Google Ngram Viewer )