burghmaster vs overseer

burghmaster

noun
  • A burgomaster. 

  • An officer who directs and lays out the meres or boundaries for the workers. 

overseer

noun
  • The manager of a plantation of slaves. 

  • An officer responsible for the care of the poor, making out lists of voters and those who had not paid taxes, etc. 

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