adobe vs terracotta

adobe

noun
  • An unburnt brick dried in the sun. 

  • The earth from which such bricks are made. 

  • A house made of adobe brick. 

terracotta

noun
  • A hard red-brown unglazed earthenware, used for pottery and building construction. 

  • A reddish brown colour, like that of terra cotta. 

adj
  • Of the colour of terracotta. 

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