saprophage vs unthrift

saprophage

noun

  • A degenerate person; a wastrel. 

  • A detritivore. 

unthrift

noun

  • A lack of thriftiness; prodigality. 

adj

  • Unthrifty. 

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