prom vs public walk

prom

noun
  • A promenade. 

  • A formal ball held at a high school or college on special occasions; e.g,. near the end of the academic year. 

  • A promenade concert. 

public walk

noun
  • A promenade or well-frequented pedestrian way in a town. 

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