chargehand vs sachem

chargehand

noun
  • A person who is in charge of a small group of workers; a lesser foreman. 

sachem

noun
  • A boss, a leader. 

  • A chief of one or several Native American tribe(s), especially of the Algonquians; a sagamore. 

  • A high-ranking officer of the Tammany Hall political organization. 

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