non compos mentis vs one brick short of a full load

non compos mentis

adj

  • Insane; not of sound mind; not in control of oneself. 

one brick short of a full load

adj

  • Not mentally sound; insane. 

  • Stupid. 

How often have the words non compos mentis and one brick short of a full load occurred in a corpus of books? (source: Google Ngram Viewer )