inspect vs underseek

inspect

verb
  • To examine critically or carefully; especially, to search out problems or determine condition; to scrutinize. 

  • To view and examine officially. 

underseek

verb
  • To examine; explore; investigate. 

  • To spend too little time or effort in seeking. 

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