drivel vs mussitate

drivel

verb
  • To talk nonsense; to talk senselessly; to drool. 

  • To use up or to be used up. 

  • To move or travel slowly. 

  • To be weak or foolish; to dote. 

noun
  • Nonsense; senseless talk. 

mussitate

verb
  • To talk indistinctly; to mutter. 

  • To say (words, etc.) indistinctly; to mutter. 

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