croaking vs ribbit

croaking

noun
  • The sound of something that croaks. 

ribbit

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

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 

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