at one's wits' end vs overwrought

at one's wits' end

overwrought

adj
  • Excessively nervous, excited, tense, angry, anxious, or upset; overemotional; very uneasy. 

  • Elaborate; overdone. 

How often have the words at one's wits' end and overwrought occurred in a corpus of books? (source: Google Ngram Viewer )