fossick vs fumble

fossick

verb
  • To search for something; to rummage. 

  • To search for gems, gold, etc., on the surface or in abandoned workings. 

  • To be troublesome. 

  • To elicit information; to ferret out. 

fumble

verb
  • To grope awkwardly in trying to find something 

  • 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. 

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 fossick and fumble occurred in a corpus of books? (source: Google Ngram Viewer )