sheepmeat vs wether

sheepmeat

noun
  • The meat of a sheep, used as food; mutton. 

wether

noun
  • A castrated goat. 

  • A castrated ram. 

verb
  • To castrate a male sheep or goat. 

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