haver vs mussitate

haver

verb
  • To talk foolishly; to chatter. 

  • To hem and haw. 

noun
  • Oats (the cereal). 

  • One who has something (in various senses). 

  • The person who has custody of a document. 

mussitate

verb
  • To talk indistinctly; to mutter. 

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

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