be- vs sub-

be-

prefix
  • Off, away, over, across 

  • About, regarding, concerning, over. 

  • By, near, next to, around, close to. 

  • On, upon, at, to, in contact with something. 

  • Forming verbs derived from nouns or adjectives, usually with the sense of "to make, become, or cause to be". 

  • Around; about. 

  • As an intensifier; i.e. thoroughly, excessively; completely; utterly. 

  • All around; about; abundantly; all over. 

sub-

prefix
  • under, beneath 

  • subsidiary, secondary 

  • almost, nearly 

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