pulley block vs splinter

pulley block

noun
  • A shell containing one or more sheaves, the whole forming a pulley. 

splinter

noun
  • A long, sharp fragment of material, often wood. 

  • A small such fragment that gets embedded in the flesh. 

  • A group that formed by splitting off from a larger membership. 

  • A double-jump bid which indicates shortage in the bid suit. 

verb
  • To come apart into long sharp fragments. 

  • To cause to break apart into long sharp fragments. 

  • To break, or cause to break, into factions. 

  • To fasten or confine with splinters, or splints, as a broken limb. 

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