sharecropper vs stockbreeder

sharecropper

noun
  • A person who enters an agreement with a land owner to farm the land and then pay a portion (share) of the produce as rent; one who sharecrops. 

stockbreeder

noun
  • A person who breeds and raises livestock. 

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