barking mad vs raving

barking mad

adj

  • Completely insane. 

raving

adj

  • Talking wildly. 

  • Causing excitement or wild praise. 

noun

  • Wild, incoherent, or irrational talk. 

adv

  • Incoherently 

How often have the words barking mad and raving occurred in a corpus of books? (source: Google Ngram Viewer )