fife vs penny whistle

fife

noun
  • A small shrill pipe, resembling the piccolo flute, used chiefly to accompany the drum in military music 

num
  • Used instead of five in radio communications to avoid confusion with fire. 

verb
  • To play this instrument. 

penny whistle

noun
  • A tin whistle. 

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