ex- vs long ago

ex-

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

  • out of 

  • outside 

  • Lacking. 

long ago

adv
  • At a time in the past, especially the distant past. 

adj
  • Existing in the relatively distant past. 

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