matchwood vs spall

matchwood

noun
  • wood, often in the form of splinters, suitable for making matches 

spall

noun
  • A splinter, fragment or chip, especially of stone. 

verb
  • To break into fragments or small pieces. 

  • To reduce, as irregular blocks of stone, to an approximately level surface by hammering. 

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