incrustation vs scurf

incrustation

noun
  • A crust or hard coating of anything upon or within a body, as a deposit of lime, sediment, etc., from water on the inner surface of a steam boiler. 

  • An accumulated characteristic of a person that disguises their true nature. 

  • Anything inlaid or embedded. 

  • A covering or inlaying of marble, mosaic, etc., attached to the masonry by cramp irons or cement. 

  • The act of incrusting, or the state of being incrusted. 

scurf

noun
  • Any crust-like formations on the skin, or in general. 

  • Minute membranous scales on the surface of some leaves, as in the goosefoot. 

  • A grey bull trout (Salvelinus confluentus). 

  • The foul remains of anything adherent. 

  • A skin disease. 

  • The flakes of skin that fall off as a result of a skin disease. 

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