arch- vs under-

arch-

prefix

  • Chief; primary; principal. 

  • Highest; most extreme. 

  • First; original. 

  • Intensely, extremely, or exceptionally. 

under-

prefix

  • Behind 

  • Beneath, under 

  • Subordinate to 

  • Deficient, below what is correct 

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