fountain vs sulfur spring

fountain

noun
  • A natural source of water; a spring. 

  • An artificial, usually ornamental, water feature (usually in a garden or public place) consisting of one or more streams of water originating from a statue or other structure. 

  • A reservoir from which liquid can be drawn. 

  • A source or origin of a flow (e.g., of favors or knowledge). 

  • A juggling pattern typically done with an even number of props where each prop is caught by the same hand that throws it. 

  • A roundel barry wavy argent and azure. 

  • A ground-based firework that projects sparks similar to a water fountain. 

  • Anything that resembles a fountain in operation. 

  • The structure from which an artificial fountain can issue. 

  • A drink poured from a soda fountain, or the cup it is poured into. 

  • A soda fountain. 

verb
  • To flow or gush as if from a fountain. 

sulfur spring

noun
  • a spring of naturally sulfurous water, often of volcanic origin and therefore hot 

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