all of vs virtually

all of

adv
  • Merely; only; no more or less than; neither more nor better than might be expected. 

  • Entirely, completely, in a specified state. 

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 all of and virtually occurred in a corpus of books? (source: Google Ngram Viewer )