cortex vs skive

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. 

skive

noun
  • An angled cut or bevel at the edge of something. 

  • An act of avoiding lessons or work. 

  • A rotating iron disk coated with oil and diamond dust used to polish the facets of a diamond. 

  • Something very easy, where one can slack off without penalty. 

verb
  • To avoid one's lessons or work (chiefly at school or university); shirk. 

  • To pare or shave off the rough or thick parts of. 

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