chief vs hairline

chief

noun
  • An informal term of address. 

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

  • The principal part or top of anything. 

  • 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. 

verb
  • To smoke cannabis. 

adj
  • Primary; principal. 

  • Intimate, friendly. 

hairline

noun
  • A very thin line in writing, drawing, or typography. 

  • A fishing line made from hair. 

  • The line along one's forehead where hair starts growing. 

  • A very thin fissure. 

adj
  • very thin, as thin as a hair 

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