shelf vs tump

shelf

noun
  • A reef, shoal or sandbar. 

  • The part of a repository where shelvesets are stored. 

  • A projecting ledge that resembles such an object. 

  • A flat, rigid structure, fixed at right angles to a wall or forming a part of a cabinet, desk etc., and used to support, store or display objects. 

  • The capacity of such an object 

tump

noun
  • A mound or hillock. 

  • A tumpline. 

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") 

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