brass monkeys vs frozen

brass monkeys

adj
  • very cold 

frozen

adj
  • Having undergone the process of freezing; in ice form. 

  • In a state such that transactions are not allowed. 

  • Retaining an older, obsolete syntax of an earlier version of a language, which now operates only on a specific word or phrase. 

  • Immobilized. 

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