loon vs poop

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. 

poop

noun
  • A stupid or ineffectual person. 

  • The stern of a ship. 

  • The poop deck. 

  • The sound of a steam engine's whistle, typically low-pitched. 

  • Fecal matter; feces. 

  • A set of data or general information, written or spoken, usually concerning machinery or a process. 

verb
  • To break seawater with the poop of a vessel, especially the poop deck. 

  • To embark a ship over the stern. 

  • To defecate. 

  • To tire, exhaust. Often used with out. 

intj
  • Expressing annoyed disappointment. 

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