disengage vs excavate

disengage

verb
  • To release or loosen from something that binds, entangles, holds, or interlocks. 

noun
  • A circular movement of the blade that avoids the opponent's parry 

excavate

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

  • To uncover (something) by digging. 

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

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

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