escarpment vs hill

escarpment

noun
  • A steep descent or declivity; steep face or edge of a ridge; ground about a fortified place, cut away nearly vertically to prevent hostile approach. 

hill

noun
  • A sloping road. 

  • A single cluster or group of plants growing close together, and having the earth heaped up about them. 

  • An elevated landmass smaller than a mountain. 

  • A heap of earth surrounding a plant. 

  • The pitcher’s mound. 

  • The raised portion of the surface of a vinyl record. 

verb
  • To form into a heap or mound. 

  • To heap or draw earth around plants. 

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