clod vs loon

clod

noun
  • A stupid person; a dolt. 

  • A lump of something, especially of earth or clay. 

  • Part of a shoulder of beef, or of the neck piece near the shoulder. 

  • The ground; the earth; a spot of earth or turf. 

verb
  • To collect into clods, or into a thick mass; to coagulate; to clot. 

  • To pelt with clods. 

  • To throw violently; to hurl. 

loon

noun
  • A crazy or deranged person; a lunatic. 

  • A boy, a lad. 

  • Any of various birds, of the order Gaviiformes, of North America and Europe that dive for fish and have a short tail, webbed feet and a yodeling cry. 

  • An English soldier of an expeditionary army in Ireland. 

  • A simpleton. 

  • A harlot; mistress. 

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