be silent vs blather

be silent

verb
  • To refrain from speaking; to say nothing. (This entry is a translation hub.) 

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. 

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