freshet vs tidewater

freshet

noun
  • A small stream, especially one flowing into the sea. 

  • A flood resulting from heavy rain or a spring thaw. 

tidewater

noun
  • Water affected by the flow of the tide, especially tidal streams. 

  • The seaboard. 

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