artesian well vs spa

artesian well

noun
  • An aquifer in which water rises to the surface under its own hydrostatic pressure. 

  • A bore-hole in an artesian basin. 

spa

noun
  • A hot tub. 

  • A trendy or fashionable resort. 

  • A convenience store. 

  • A health resort near a mineral spring or hot spring. 

  • A health club. 

  • A clumsy person (see spastic) 

  • An idiot; a gobshite 

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