polish vs saffron

polish

verb
  • To shine; to make a surface very smooth or shiny by rubbing, cleaning, or grinding. 

  • To refine; to wear off the rudeness, coarseness, or rusticity of; to make elegant and polite. 

  • To apply shoe polish to shoes. 

  • To become smooth, as from friction; to receive a gloss; to take a smooth and glossy surface. 

  • To refine; remove imperfections from. 

noun
  • Refinement; cleanliness in performance or presentation. 

  • Cleanliness; smoothness, shininess. 

  • A substance used to polish. 

saffron

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

  • 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 embellish. 

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. 

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