way off vs wide of the mark

way off

adj
  • very wrong, not even close 

  • remote; far; distant (in space) 

  • remote; far in the future 

wide of the mark

adj
  • (Very) inaccurate. 

  • Of a projectile: missing the target. 

How often have the words way off and wide of the mark occurred in a corpus of books? (source: Google Ngram Viewer )