saffron vs sorrel

saffron

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. 

adj
  • Having an orange-yellow colour. 

sorrel

noun
  • A brown colour, with a tint of red. 

  • Rumex acetosa (common sorrel, garden sorrel), sometimes used as a salad vegetable. 

  • The roselle, Hibiscus sabdariffa. 

  • Members of genus Oxalis or family Oxalidaceae, woodsorrels. 

  • A drink, consumed especially in the Caribbean around Christmas, made from the flowers of Hibiscus sabdariffa: hibiscus tea. 

adj
  • Of a brown colour, with a tint of red. (especially: a sorrel horse) 

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