cynosure vs imager

cynosure

noun
  • Something that is the center of attention; an object that serves as a focal point of attraction and admiration. 

  • Ursa Minor or Polaris, the North Star, used as a guide by navigators. 

  • That which serves to guide or direct; a guiding star. 

imager

noun
  • One who images or forms likenesses; a sculptor. 

  • A system that creates a digital copy such as a disk image. 

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