circlet vs finger ring

circlet

noun
  • A ring (typically of gold or silver) worn as an ornament on the head. 

  • A round body; an orb. 

  • A crown without arches or a covering. 

  • A small circle. 

finger ring

noun
  • A ring (often ornamental and/or precious) designed to be worn on a finger. 

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