rings vs springboard

rings

noun
  • A gymnastics apparatus and discipline consisting of 2 rings suspended from a bar. 

  • A traditional Irish game of throwing rings onto hooks. 

springboard

noun
  • A diving board consisting of a flexible, springy, cantilevered platform, used for diving into water. 

  • A small platform on springs and usually hinged at one end, used to launch or vault onto other equipment. 

  • Anything that gives a person or thing energy or impulse, or that serves to launch or begin something. 

verb
  • To launch or propel as if from a springboard, especially toward political office. 

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