discoidal vs quoit

discoidal

adj
  • Having the flat, circular shape of a disc or a quoit 

quoit

verb
  • To play quoits. 

  • To throw like quoit. 

noun
  • The discus used in ancient sports. 

  • An ancient burial mound, synonymous with dolmen. 

  • A ring of rubber or rope similarly used in the game of deck-quoits. 

  • A flat disc of metal or stone thrown at a target in the game of quoits. 

  • The flat stone covering a cromlech. 

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