foundling vs jetsam

foundling

noun
  • An abandoned child, left by its parent(s), often a baby left at a convent or similar safe place. 

jetsam

noun
  • Discarded odds and ends. 

  • Articles thrown overboard from a ship or boat in order to lighten the load of a ship in distress. 

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