daft as a brush vs loony

daft as a brush

adj

  • Tending to do or say silly things. 

loony

adj

  • Very silly, absurd. 

  • Insane. 

noun

  • An insane or very foolish person. 

How often have the words daft as a brush and loony occurred in a corpus of books? (source: Google Ngram Viewer )