ex- vs then

ex-

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

  • out of 

  • outside 

  • Lacking. 

then

adv
  • Next in order of place. 

  • At that time. 

  • In addition; also; besides. 

  • At the same time; on the other hand. 

  • Used to contradict an assertion. 

  • In that case. 

  • Soon afterward. 

adj
  • Being so at that time. 

noun
  • That time 

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