ganger vs overman

ganger

noun
  • One who oversees a gang of workmen. 

  • One who is employed in conveying the coal through the gangways. 

  • One who or that which walks or goes; a goer; a walker. 

  • A horse that goes quickly. 

  • A length of chain, one end of which is fastened to an anchor when let go, when the other end is fastened to a hawser. 

overman

noun
  • A person who supervises others; a supervisor, especially in a mine. 

  • A person with great powers; a superman. 

verb
  • To provide with too many personnel; overstaff. 

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