arbiter vs bargainer

arbiter

noun
  • A person appointed, or chosen, by parties to determine a controversy between them; an arbitrator. 

  • A person or object having the power of judging and determining, or ordaining, without control; one whose power of deciding and governing is not limited. 

  • A component in circuitry that allocates scarce resources. 

verb
  • To act as arbiter. 

bargainer

noun
  • A person who makes a bargain. 

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