co- vs in-

co-

prefix
  • to the same degree 

  • together; mutually; jointly 

  • partner or subordinate in an activity 

  • of the opposite, of the counterpart; dual 

in-

prefix
  • in, into, towards, within. 

  • Used with certain words to reverse their meaning 

  • in, into 

  • Added to adjectives to mean not 

  • Added to nouns to mean lacking or without 

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