co- vs inter-

co-

prefix
  • together; mutually; jointly 

  • to the same degree 

  • partner or subordinate in an activity 

  • of the opposite, of the counterpart; dual 

inter-

prefix
  • mutual, together 

  • within 

  • intermediate 

  • between, amid, among 

  • reciprocal, to each other 

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