chief vs leading

chief

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

  • An informal term of address. 

  • 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. 

adj
  • Primary; principal. 

  • Intimate, friendly. 

verb
  • To smoke cannabis. 

leading

noun
  • An act by which one is led or guided. 

  • Vertical space added between lines; line spacing. 

adj
  • Providing guidance or direction. 

  • Occurring in advance; preceding. 

  • Ranking first. 

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