pretty well vs virtually

pretty well

adv
  • Synonym of pretty much (“almost completely; very nearly”) 

  • Used other than figuratively or idiomatically: see pretty, well. 

virtually

adv
  • Almost but not quite. 

  • Of a covering space of finite index. 

  • In essence, but not in fact. 

  • By computer or in cyberspace 

  • Of a substructure of finite index. 

  • Without exaggeration. 

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