dumb as a post vs one brick short of a full load

dumb as a post

adj

  • Extremely stupid. 

  • Utterly mute; lacking the ability to speak. 

one brick short of a full load

adj

  • Stupid. 

  • Not mentally sound; insane. 

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