blabber vs talk the hind leg off a donkey

blabber

verb

  • To blather; to talk foolishly or incoherently. 

  • To blab; to reveal a secret. 

noun

  • A person who blabs; a tattler; a telltale. 

talk the hind leg off a donkey

verb

  • To talk a lot. 

How often have the words blabber and talk the hind leg off a donkey occurred in a corpus of books? (source: Google Ngram Viewer )