overseer vs ump

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. 

ump

noun
  • An umpire. 

verb
  • To act as an umpire (in). 

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