hill vs upthrow

hill

verb
  • To form into a heap or mound. 

  • To heap or draw earth around plants. 

noun
  • 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. 

  • A sloping road. 

  • The pitcher’s mound. 

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

upthrow

verb
  • To throw up (a mass of material) from below, causing a fault. 

  • To be thrown up from below, causing a fault. 

noun
  • A fault in which a mass of material has been thrown up from below. 

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