coat vs cortex

coat

noun
  • The fur or feathers covering an animal's skin.ᵂᵖ 

  • Canvas painted with thick tar and secured round a mast or bowsprit to prevent water running down the sides into the hold (now made of rubber or leather). 

  • A covering of material, such as paint.ᵂᵖ 

  • A coat of arms.ᵂᵖ 

  • An outer garment covering the upper torso and arms.ᵂᵖ 

  • The habit or vesture of an order of men, indicating the order or office; cloth. 

  • A coat card. 

verb
  • To cover like a coat. 

  • To cover with a coating of some material. 

cortex

noun
  • The outer surface of a piece of flint. 

  • The tissue of a stem or root that lies inward from the epidermis, but exterior to the vascular tissue. 

  • The outer layer of an internal organ or body structure, such as the kidney or the brain. 

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