adobe vs gault

adobe

noun
  • The earth from which such bricks are made. 

  • An unburnt brick dried in the sun. 

  • A house made of adobe brick. 

gault

noun
  • A type of stiff, blue clay, sometimes used for making bricks. 

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