restaurant vs soda fountain

restaurant

noun
  • An eating establishment in which diners are served food, usually by waiters at their tables but sometimes (as in a fast food restaurant) at a counter. 

soda fountain

noun
  • A counter, in a shop, at which sodas, ice-creams etc are prepared and served. 

  • An apparatus for dispensing carbonated soft drinks. 

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