circus ring vs volute

circus ring

noun
  • A circular arena in a circus, where the acts are performed. 

volute

noun
  • A spiral or scroll form. 

  • The spirals or whorls on a gastropod's shell. 

  • The casing in a centrifugal pump, whose shape is somewhat similar to architectural volutes. 

  • A scroll-shaped carving at the tuning head of a stringed musical instrument, similar to architectural volutes. 

  • The characteristic spiral curve on an Ionic capital, widely copied in other styles and in neoclassical architecture. 

  • Any marine gastropod of the family Volutidae. 

adj
  • Of a spring: having a spiral curve on its tail. 

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