sweep away vs wash off

sweep away

verb
  • To remove something by, or as if by, sweeping. 

  • to completely destroy, to annihilate 

  • To overwhelm someone emotionally; sweep someone off their feet. 

wash off

verb
  • To remove (or be removed) by washing. 

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