cud vs ruminate

cud

verb
  • To bring back into the mouth and chew a second time. 

noun
  • The portion of food which is brought back into the mouth by ruminating animals from their first stomach, to be chewed a second time. 

ruminate

verb
  • To chew cud. (Said of ruminants.) Involves regurgitating partially digested food from the rumen. 

  • To meditate or reflect. 

  • To meditate or ponder over; to muse on. 

adj
  • Having a hard albumen penetrated by irregular channels filled with softer matter, as the nutmeg and the seeds of the North American papaw. 

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