crackers vs round the bend

crackers

noun

  • A kind of noisy leather pants or trousers. 

adj

  • Crazy, insane. 

round the bend

prep

  • Crazy, mad or insane. 

  • Close to or in close proximity to another location. 

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