co- vs over-

co-

prefix
  • to the same degree 

  • together; mutually; jointly 

  • partner or subordinate in an activity 

  • of the opposite, of the counterpart; dual 

over-

prefix
  • Superior. 

  • Surrounding or covering. 

  • Excessive; excessively. 

  • Exceptional; extremely or intensely. 

  • Above, or higher. 

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