footpath vs stairway

footpath

noun
  • Any set path or trail to be used by people walking. 

  • A paved path located at the side of a road for the use of pedestrians. 

stairway

noun
  • A set of steps, with or without a case, that allow one to walk up or down. 

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