loon vs sane

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. 

sane

adj
  • Being in a healthy condition; not deranged; thinking rationally. 

  • Mentally sound; possessing a rational mind; having the mental faculties in such condition as to be able to anticipate and judge the effect of one's actions in an ordinary manner. 

  • Rational; reasonable; sensible. 

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