fumble vs stumble

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. 

stumble

verb
  • To trip or fall; to walk clumsily. 

  • To cause to stumble or trip. 

  • To make a mistake or have trouble. 

  • To strike or happen (upon a person or thing) without design; to fall or light by chance; with on, upon, or against. 

  • To mislead; to confound; to cause to err or to fall. 

noun
  • An error or blunder. 

  • A fall, trip or substantial misstep. 

  • A clumsy walk. 

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