ab- vs syn-

ab-

prefix
  • From. 

  • Away from; outside of. 

  • A unit of electromagnetic charge in the centimeter-gram-second system: the abcoulomb. 

syn-

prefix
  • concomitant 

  • with, together 

  • identical 

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