broth vs seawater

broth

noun
  • Water in which food (meat or vegetable etc) has been boiled. 

  • A soup made from broth and other ingredients such as vegetables, herbs or diced meat. 

seawater

noun
  • The saltwater of a sea or ocean. 

adj
  • Associated in some way with seawater, or intended for dealing with seawater. 

  • Consisting of seawater. 

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