chatelain vs foreman

chatelain

noun
  • Synonym of castellan: the lord of a castle; a caretaker entrusted to oversee a castle for its lord. 

foreman

noun
  • A slave assistant to the white overseer who managed field hands. 

  • The leader of a work crew. 

  • The member of a jury who presides over it and speaks on its behalf. 

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