low tide vs low water

low tide

noun
  • The tide at its lowest level for a particular tidal cycle at a certain place. 

  • The time of day when the sea has receded to its lowest level. 

low water

noun
  • The location of low tide in a coastal area. 

  • The temporary situation of having little money. 

  • The lowest stage of a river. 

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