adobe vs air brick

adobe

noun
  • A house made of adobe brick. 

  • An unburnt brick dried in the sun. 

  • The earth from which such bricks are made. 

air brick

noun
  • A brick-sized block with holes which is embedded in a wall to allow ventilation through it. 

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