bleat vs ribbit

bleat

verb
  • Of a sheep or goat, to make its characteristic cry; of a human, to mimic this sound. 

  • Of a person, to complain. 

noun
  • The characteristic cry of a sheep or a goat. 

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 bleat and ribbit occurred in a corpus of books? (source: Google Ngram Viewer )