piling vs stringpiece

piling

noun
  • A structural support comprising a length of wood, steel, or other construction material. 

  • The act of heaping up. 

  • The process of building up, heating, and working fagots or piles to form bars, etc. 

stringpiece

noun
  • A long piece of timber, forming a margin or edge of any piece of construction; especially one of the longitudinal pieces supporting a flight or run of stairs. 

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