co- vs pari-

co-

prefix
  • to the same degree 

  • together; mutually; jointly 

  • partner or subordinate in an activity 

  • of the opposite, of the counterpart; dual 

pari-

prefix
  • Equal 

  • Even 

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