bumble vs utter

bumble

verb
  • To act in an inept, clumsy or inexpert manner; to make mistakes. 

  • To boom, as a Eurasian bittern. 

  • To buzz, as a fly. 

noun
  • A bumble-bee. 

  • A confusion; a jumble. 

  • The Eurasian bittern. 

utter

verb
  • To commit the crime of uttering (knowingly presenting forged documentation). 

  • To produce (speech or other sounds) with one's voice. 

  • To put (currency) into circulation. 

  • To produce (a noise) (of an inanimate object). 

  • To reveal or express (an idea, thought, desire, etc.) with speech. 

adj
  • Absolute, unconditional, total, complete. 

  • Outer; furthest out, most remote. 

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