hairline vs imperial

hairline

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

  • A fishing line made from hair. 

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

  • A very thin fissure. 

adj
  • very thin, as thin as a hair 

imperial

noun
  • A tuft of hair on the lower lip (so called from its use by Napoleon III). 

  • Any of several combinations of cards which score in this game. 

  • A crown imperial. 

  • A bottle of wine (usually Bordeaux) containing 6 liters of fluid, eight times the volume of a standard bottle. 

  • An outside seat on a diligence or carriage. 

  • A writing paper size measuring 30 × 22 inches, or printing paper measuring 32 × 22 inches. 

  • A kind of dome, as in Moorish buildings. 

  • A variety of green tea. 

  • A card game differing from piquet in some minor details, and in having a trump. 

adj
  • Related to an empire, emperor, or empress. 

  • Very grand or fine. 

  • Relating to the British imperial system of measurement. 

  • Of special, superior, or unusual size or excellence. 

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