ruby vs ruddle

ruby

verb
  • To make red; to redden. 

noun
  • A deep red colour. 

  • A ruby hummer, a South American hummingbird, Clytolaema rubricauda. 

  • A red bird-of-paradise, Paradisaea rubra. 

  • A pronunciation guide written above or beside Chinese or Japanese characters. 

  • A clear, deep, red variety of corundum, valued as a precious stone. 

  • The tincture red or gules. 

adj
  • Of a deep red colour. 

ruddle

verb
  • To mark something with red ochre. 

  • To raddle or twist. 

  • To sift together; to mix, as through a sieve. 

noun
  • A form of red ochre sometimes used to mark sheep. 

  • A riddle or sieve. 

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