jingle bell vs sleigh bell

jingle bell

noun
  • A small, hollow, spherical metal bell with a narrow slit opening or small holes, containing a loose ball or rod as a clapper, which is attached to a horse's harness as a signal, or (music) used as a musical instrument. 

sleigh bell

noun
  • Synonym of jingle bell 

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