spale vs spall

spale

noun
  • A chip or splinter of wood. 

  • One of a number of cross-bands fastened temporarily to the frames to keep them in place until properly secured. 

  • A strengthening cross timber. 

  • A lath; a shaving or chip, as of wood or stone. 

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 spale and spall occurred in a corpus of books? (source: Google Ngram Viewer )