genius vs loon

genius

noun
  • Someone possessing extraordinary intelligence or skill; especially somebody who has demonstrated this by a creative or original work in science, music, art etc. 

  • Inspiration, a mental leap, an extraordinary creative process. 

  • Extraordinary mental capacity. 

  • The tutelary deity or spirit of a place or person. 

adj
  • Ingenious, brilliant, very clever, or original. 

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 genius and loon occurred in a corpus of books? (source: Google Ngram Viewer )