crackers vs doolally

crackers

adj

  • Crazy, insane. 

noun

  • A kind of noisy leather pants or trousers. 

doolally

adj

  • Eccentric; insane, mad. 

  • Carried away by enjoyment, excitement, etc. 

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