shale vs sweep away

shale

verb
  • To take off the shell or coat of. 

noun
  • A shell or husk; a cod or pod. 

  • A fine-grained sedimentary rock of a thin, laminated, and often friable, structure. 

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. 

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