definitive vs hairline

definitive

noun
  • a word, such as a definite article or demonstrative pronoun, that defines or limits something 

  • an ordinary postage stamp that is part of a series of all denominations or is reprinted as needed to meet demand 

adj
  • conclusive or decisive 

  • general, not issued for commemorative purposes 

  • explicitly defined 

  • definite, authoritative and complete 

  • limiting; determining 

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 definitive and hairline occurred in a corpus of books? (source: Google Ngram Viewer )