gaffer vs mzee

gaffer

noun
  • An old man. 

  • A chief lighting technician for a motion-picture or television production. 

  • The leader of a group or team, such as a boss, foreman, coach, publican. 

  • The baby in the house. 

  • A sailor. 

  • A glassblower. 

mzee

noun
  • An elder (old person). 

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