-less vs ex-

-less

suffix
  • Lacking (something); without (something). Added usually to a noun to form an adjective signifying a lack of that noun. 

ex-

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

  • out of 

  • outside 

  • Lacking. 

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