focal point vs stoker

focal point

noun
  • A feature that attracts particular attention. 

  • A solution that people will tend to use in the absence of communication, because it seems natural, special, or relevant. 

  • The centre of any activity. 

  • A focus; a point at which rays of light or other radiation converge. 

stoker

noun
  • A device for stoking a fire; a poker. 

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

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