fire people vs stoker

fire people

noun
  • firefighters, people who have been trained to put out fires 

stoker

noun
  • A person who stokes, especially one on a steamship or steam train, who stokes coal in the boilers. 

  • A person who pedals on the back of a tandem bicycle. 

  • A device for stoking a fire; a poker. 

  • A device that feeds coal into a furnace, etc., automatically. 

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