act as honest broker vs chaffer

act as honest broker

chaffer

verb
  • To talk much and idly; to chatter. 

  • To buy. 

  • To haggle or barter. 

noun
  • The upper sieve of a cleaning shoe in a combine harvester, where chaff is removed 

  • bargaining; merchandise 

How often have the words act as honest broker and chaffer occurred in a corpus of books? (source: Google Ngram Viewer )