bumble vs fumble

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. 

fumble

verb
  • To grope about in perplexity; to seek awkwardly. 

  • To drop a ball or a baton etc. by accident. 

  • To handle much; to play childishly; to turn over and over. 

  • To blunder uncertainly. 

  • To handle nervously or awkwardly. 

  • To grope awkwardly in trying to find something 

noun
  • A ball etc. that has been dropped by accident. 

  • A dessert similar to a cross between a fool and a crumble. 

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