floorboard vs flooring

floorboard

noun
  • Any of the long boards laid over joists to make a floor. 

  • The floor of a car. 

verb
  • To sink the gas pedal into the floorboard of the car, in order to bring the car to the highest possible speed. 

flooring

noun
  • A material used to make floors. 

  • The act of putting one's opponent on the floor; a knockdown. 

  • A floor. 

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