dotty vs off the chain

dotty

adj

  • Having many dots. 

  • Mildly insane or eccentric; often, senile. 

noun

  • A shotgun. 

off the chain

prep

  • Free from work or direct supervision. 

  • Crazy and exciting; delirious and wild. 

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