duffer vs goatmeat

duffer

noun
  • A cow that does not produce milk. 

  • An incompetent, indolent, or clumsy person. 

  • Any of various nymphalid butterflies of the genus Discophora. 

  • A player having little skill, especially a golfer who duffs. 

  • A racing pigeon that does not perform well. 

goatmeat

noun
  • The meat of a goat, used as food; chevon. 

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