bray vs ribbit

bray

verb
  • To make a harsh, discordant sound like a donkey's bray. 

  • To make or utter (a shout, sound, etc.) discordantly, loudly, or in a harsh and grating manner. 

  • Of an animal (now chiefly of animals related to the ass or donkey, and the camel): to make its cry. 

  • To hit (someone or something). 

noun
  • The cry of an animal, now chiefly that of animals related to the ass or donkey, or the camel. 

  • Any discordant, grating, or harsh sound. 

ribbit

verb
  • To make the sound of a frog or toad. 

intj
  • The vocal sound made by a frog or toad. 

  • Used to anonymously and disrespectfully break silence, as in educational or ceremonial settings 

noun
  • The vocal sound made by a frog or toad. 

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