piper vs plover

piper

noun
  • A sea urchin (Cidaris cidaris) with very long spines, native to the American and European coasts. 

  • A bagpiper. 

  • A musician who plays a pipe. 

  • A baby pigeon. 

  • A common European gurnard (Trigla lyra), having a large head, with prominent nasal projection, and with large, sharp, opercular spines. 

plover

noun
  • Any of various wading birds of the family Charadriidae. 

  • The masked lapwing, Vanellus miles. 

verb
  • To dote over, or, crowd or nestle with 

  • To wade along the shore, examining the sand like a plover does. 

  • To hunt for plover. 

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