mouton vs sheepflesh

mouton

noun
  • Sheepskin processed to resemble beaver or seal fur. 

  • A 14th-century French gold coin, weighing about 70 grains. 

sheepflesh

noun
  • The meat or flesh of sheep; mutton. 

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