blather vs talk at

blather

verb
  • To talk rapidly without making much sense. 

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

noun
  • Nonsensical or foolish talk. 

talk at

verb
  • To speak with (someone) without truly listening to their response or interacting meaningfully. 

  • To speak with; to have a conversation with. 

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