footboard vs gradin

footboard

noun
  • A board or small raised platform on which to support or rest the feet, such as that found in a carriage. 

  • A board serving as a step on a vehicle. 

  • An upright board across the foot of a bedstead. 

  • A place to stand on a scooter or skateboard. 

gradin

noun
  • Any of a series of terraced steps or seats, as in an arena or an altar. 

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