footpace vs gradin

footpace

noun
  • A dais, or elevated platform; the highest step of the altar; a landing in a staircase. 

  • A walking pace or step. 

gradin

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

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