adobe vs marl

adobe

noun
  • The earth from which such bricks are made. 

  • An unburnt brick dried in the sun. 

  • A house made of adobe brick. 

marl

noun
  • A mixed earthy substance, consisting of carbonate of lime, clay, and possibly sand, in very variable proportions, and accordingly designated as calcareous, clayey, or sandy. 

verb
  • To cover with the earthy substance called marl. 

  • To cover, as part of a rope, with marline, marking a peculiar hitch at each turn to prevent unwinding. 

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