apo- vs epi-

apo-

prefix
  • away from, or separate 

  • the apoprotein form of the protein 

  • derived from, or related to 

  • without, or lacking 

epi-

prefix
  • Above, over, on 

  • In addition to 

  • Denotes an epimeric form 

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