Frenchman vs red-legged partridge

Frenchman

noun
  • The red-legged partridge. 

  • A man of French birth or nationality. 

  • A home-made tool used by bricklayers to cut excess mortar from newly pointed brickwork. 

red-legged partridge

noun
  • Any partridge of species Alectoris rufa. 

How often have the words Frenchman and red-legged partridge occurred in a corpus of books? (source: Google Ngram Viewer )