round the bend vs up the pole

round the bend

prep
  • Crazy, mad or insane. 

  • Close to or in close proximity to another location. 

up the pole

prep
  • Crazy; at one's wits' end. 

  • In favour or good repute; strait-laced. 

  • In trouble or difficulty. 

  • In confusion or error. 

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