chief vs first lieutenant

chief

noun
  • The principal part or top of anything. 

  • A leader or head of a group of people, organisation, etc. 

  • An informal term of address. 

  • An informal term of address for a Native American or First Nations man. 

  • The top part of a shield or escutcheon; more specifically, an ordinary consisting of the upper part of the field cut off by a horizontal line, generally occupying the top third. 

adj
  • Primary; principal. 

  • Intimate, friendly. 

verb
  • To smoke cannabis. 

first lieutenant

noun
  • An equivalent rank in other military forces. 

  • The second lowest rank of a commissioned officer in the United States Army, Air Force, or Marine Corps, ranking above a second lieutenant and below a captain. The rank of first lieutenant is equivalent to the naval rank of lieutenant junior grade. 

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