hill vs tump

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. 

tump

verb
  • To form a mass of earth or a hillock around. 

  • To fall over. 

  • To draw or drag, as a deer or other animal after it has been killed. 

  • to bump, knock (usually used with "over", possibly a combination of "tip" and "dump") 

noun
  • A tumpline. 

  • A mound or hillock. 

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