chunter vs harp

chunter

verb
  • To grumble, complain. 

  • To speak in a soft, indistinct manner, mutter. 

harp

verb
  • To repeatedly mention a subject. 

  • To play (a tune) on the harp. 

  • To play on (a harp or similar instrument). 

noun
  • Any instrument of the same musicological type. 

  • A grain sieve. 

  • A harmonica. 

  • A musical instrument consisting of a body and a curved neck, strung with strings of varying length that are stroked or plucked with the fingers and are vertical to the soundboard when viewed from the end of the body 

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