at wits’ end vs violent

at wits’ end

violent

adj
  • Produced or effected by force; not spontaneous; unnatural. 

  • Involving extreme force or motion. 

  • Involving physical conflict. 

  • Likely to use physical force. 

  • Intensely vivid. 

How often have the words at wits’ end and violent occurred in a corpus of books? (source: Google Ngram Viewer )