deterioration vs low water

deterioration

noun
  • The process of making or growing worse, or the state of having grown worse. 

low water

noun
  • The temporary situation of having little money. 

  • The lowest stage of a river. 

  • The location of low tide in a coastal area. 

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