batty vs doolally

batty

adj

  • Mad, crazy, silly. 

noun

  • The buttocks or anus. 

  • A homosexual man. 

doolally

adj

  • Eccentric; insane, mad. 

  • Carried away by enjoyment, excitement, etc. 

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