shoal vs tump

shoal

verb
  • To become shallow. 

  • To arrive at a shallow (or less deep) area. 

  • To collect in a shoal; to throng. 

  • To cause a shallowing; to come to a more shallow part of. 

noun
  • A sandbank or sandbar creating a shallow. 

  • A shallow in a body of water. 

  • A large number of fish (or other sea creatures) of the same species swimming together. 

  • Any large number of persons or things. 

tump

verb
  • To fall over. 

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

  • 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 shoal and tump occurred in a corpus of books? (source: Google Ngram Viewer )