daub vs gypsum

daub

noun
  • A soft coating of mud, plaster, etc. 

  • Excrement or clay used as a bonding material in construction. 

  • A crude or amateurish painting. 

verb
  • To apply (something) to a surface in hasty or crude strokes. 

  • To paint (a picture, etc.) in a coarse or unskilful manner. 

gypsum

noun
  • A mineral consisting of hydrated calcium sulphate. When calcinated, it forms plaster of Paris. 

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