piping vs whistler

piping

noun
  • An act of making music or noise with pipes. 

  • A system of pipes that compose a structure; pipework. 

  • The process of an animal just beginning to break out of its egg; precedes hatching. 

  • The sound of musical pipes. 

  • An ornamentation on the edges of a garment; a small cord covered with cloth. 

  • Icing extruded from a piping bag. 

  • propagation by cuttings 

  • A piece cut off to be set or planted; a cutting. 

adj
  • High-pitched. 

whistler

noun
  • Someone or something that whistles, or who plays a whistle as a musical instrument. 

  • The mountain beaver (Aplodontia rufa). 

  • The goldeneye (certain ducks of genus Bucephala). 

  • The whistling marmot (Marmota caligata). 

  • An audio-frequency electromagnetic wave produced by atmospheric disturbances such as lightning. 

  • A broken-winded horse. 

  • Any of several passerine birds of the genera Pachycephala and Coracornis, of Australasia and the western Pacific. 

  • Any bird that whistles or is noted for its whistling vocalisations (applied regionally to various specific species). 

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