bellwether vs eagle

bellwether

noun
  • Anything that indicates future trends. 

  • A stock or bond that is widely believed to be an indicator of the overall market's condition. 

  • The leading sheep of a flock, having a bell hung round its neck. 

eagle

noun
  • A 13th-century coin minted in Europe and circulated in England as a debased sterling silver penny, outlawed under Edward I of England. 

  • A gold coin with a face value of ten dollars, formerly used in the United States. 

  • A score of two under par for a hole. 

  • Any of several large carnivorous and carrion-eating birds in the family Accipitridae, having a powerful hooked bill and keen vision. 

verb
  • To score an eagle. 

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