apo- vs under-

apo-

prefix

  • away from, or separate 

  • the apoprotein form of the protein 

  • derived from, or related to 

  • without, or lacking 

under-

prefix

  • Behind 

  • Beneath, under 

  • Subordinate to 

  • Deficient, below what is correct 

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