ex- vs non-

ex-

prefix
  • Lacking. 

  • former, but still living (almost always used with a hyphen) 

  • out of 

  • outside 

non-

prefix
  • Used in the sense of no or none, to show lack of or failure to perform; or in the sense of not, to negate the meaning of the word to which it is prefixed. 

  • prevocalic form of nona- 

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