co- vs multi-

co-

prefix
  • together; mutually; jointly 

  • to the same degree 

  • partner or subordinate in an activity 

  • of the opposite, of the counterpart; dual 

multi-

prefix
  • More than one; pertaining to more than one thing. 

  • Many; pertaining to many things. 

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