peep vs whistler

peep

noun
  • A short, soft, high-pitched sound, as made by a baby bird. 

  • The sound of a steam engine's whistle; typically shrill. 

  • A quick look or glimpse, especially a furtive one. 

  • A feeble utterance or complaint. 

  • A sandpiper or other small wader. 

  • The first partial appearance of something; a beginning to appear. 

  • person. 

verb
  • To look, especially through a narrow opening, or while trying not to be seen or noticed. 

  • To speak briefly with a quiet voice. 

  • To make a soft, shrill noise like a baby bird. 

  • To begin to appear; to look forth from concealment; to make the first appearance. 

  • To take a look at; check out. 

whistler

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

  • The mountain beaver (Aplodontia rufa). 

  • The goldeneye (certain ducks of genus Bucephala). 

  • The whistling marmot (Marmota caligata). 

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

  • 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. 

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