piebald vs speckly

piebald

adj
  • Spotted or blotched, especially in black and white. 

  • Of mixed character, heterogeneous. 

noun
  • An animal with piebald coloration. 

speckly

adj
  • speckled; marked with speckles 

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