ivory vs saffron

ivory

adj
  • Resembling or having the colour of ivory. 

  • Made of ivory. 

noun
  • The keys of a piano. 

  • A creamy white color, the color of ivory. 

  • The hard white form of dentin which forms the tusks of elephants, walruses and other animals. 

  • The teeth. 

  • A white person. 

  • Something made from or resembling ivory. 

  • A die (object bearing numbers, thrown in games of chance). 

saffron

adj
  • Having an orange-yellow colour. 

noun
  • An orange-yellow colour, the colour of a lion's pelt. 

  • A spice (seasoning) and colouring agent made from the stigma and part of the style of the plant, sometimes or formerly also used as a dye and insect repellent. 

  • The plant Crocus sativus, a crocus. 

verb
  • To add saffron to (a food), for taste, colour etc. 

  • To dye (a fabric, garment, etc.) with a saffron-based dye. 

  • To give a saffron colour to (something). 

  • To colour (a metal or wooden surface) with a gilding product containing saffron. 

  • To embellish. 

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