Irish bull vs blatherskite

Irish bull

noun
  • A ludicrous, incongruent or logically absurd statement. 

blatherskite

noun
  • A worthless fellow; a deadbeat. 

  • Nonsense or blather; empty talk. 

  • A voluble purveyor of nonsense; a blusterer. 

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