panpipes vs party horn

panpipes

noun
  • An instrument consisting of a series of ten or more tubes of different lengths, typically closed at the bottom and open at the top. The instrument is played by blowing across the open end at the top. 

party horn

noun
  • A paper or plastic tube which may be blown into to create a sound, and sometimes is rolled up in a coil which unrolls and straightens out when blown. 

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