enforcer vs extender

enforcer

noun
  • A player who physically intimidates or confronts the opposition. 

  • The member of a group, especially of a gang, charged with keeping dissident members obedient. 

  • A hired strongman, especially working for the underworld. 

  • One who enforces. 

extender

noun
  • A runner, or quick-draw. (from sense #2) 

  • Any of various substances designed to extend any of several properties of a material. 

  • Any substance added to food to bulk it out, with a higher protein content than a filler. 

  • A phrase that extends an expression to include further members of a set, e.g. "and stuff", "or something". 

  • Any of various components designed to extend the length of a device. 

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