roughly vs virtually

roughly

adv
  • Unevenly or irregularly. 

  • Without precision or exactness; imprecisely but close to in quantity or amount; approximately. 

  • In a rough manner; without kindness, softness, or gentleness. 

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