excavate vs fossick

excavate

verb
  • To uncover (something) by digging. 

  • To make a hole in (something); to hollow. 

  • To remove part of (something) by scooping or digging it out. 

noun
  • Any member of a major grouping of unicellular eukaryotes, of the clade Excavata. 

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. 

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