quarrying vs rubble

quarrying

noun
  • A small piece of stone chipped off any stone found in a quarry. 

  • The extraction of material from a quarry. 

rubble

noun
  • The broken remains of an object, usually rock or masonry. 

  • The whole of the bran of wheat before it is sorted into pollard, bran, etc.. 

  • A mass or stratum of fragments of rock lying under the alluvium and derived from the neighbouring rock. 

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