clonk vs clunk

clonk

verb
  • To make such a sound. 

noun
  • A stick-like tool used to strike the surface of the water and produce a sound that causes nearby fish to attack the bait. 

  • The abrupt sound of two hard objects coming into contact. 

clunk

verb
  • to make such a sound 

noun
  • A dull, metallic sound, especially one made by two bodies coming into contact. 

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