doolally vs gaga

doolally

adj

  • Eccentric; insane, mad. 

  • Carried away by enjoyment, excitement, etc. 

gaga

adj

  • Crazy. 

  • Infatuated. 

  • Mentally senile. 

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