eyeball vs walleye

eyeball

noun
  • The ball of the eye. 

  • A face-to-face meeting. 

  • A person's focus of attention. 

  • A favourite or pet; the apple of someone's eye. 

  • A readership or viewership. 

verb
  • To roll one's eyes. 

  • To gauge, estimate or judge by eye, rather than measuring precisely; to look or glance at. 

  • To scrutinize. 

  • To stare at intently. 

walleye

noun
  • One or a pair of sideways-looking misaligned eyes. 

  • An unusually pale eye. 

  • A species of gamefish, Sander vitreus, native to the Northern U.S. and Canada with pale, reflective eyes. 

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