root about vs scout out

root about

verb
  • To search for something in a similar manner. 

  • To rummage; to look for something in a somewhat aimless fashion. 

  • To forage by poking the snout here and there. 

scout out

verb
  • to search, to look for 

  • to track down, to find by searching 

How often have the words root about and scout out occurred in a corpus of books? (source: Google Ngram Viewer )