clear away vs shale

clear away

verb
  • To dispose of, to get rid of, to remove. 

  • To tidy up, to remove mess or obstacles from a place to make it neat. 

  • To prepare some object for use by removing obstacles, untying or unfastening it. 

  • To leave, disappear 

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. 

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