blather vs yatter

blather

noun
  • Nonsensical or foolish talk. 

verb
  • To say (something foolish or nonsensical); to say (something) in a foolish or overly verbose way. 

  • To talk rapidly without making much sense. 

yatter

noun
  • Natter; prattle; mindless chatter. 

verb
  • To natter; to prattle; to chatter mindlessly. 

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