shelving vs sloped

shelving

adj

  • sloping steeply 

noun

  • The side-rails of a cart or waggon. 

  • The bank of a river etc. 

  • Shelves collectively. 

sloped

adj

  • That has or have a slope. 

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