drivel vs lose the thread

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. 

lose the thread

verb
  • To get distracted and lose track of something (one's train of thought, a conversation). 

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