be on the point of collapse vs totter

be on the point of collapse

totter

noun
  • An unsteady movement or gait. 

verb
  • To walk, move or stand unsteadily or falteringly; threatening to fall. 

  • To be on the brink of collapse. 

How often have the words be on the point of collapse and totter occurred in a corpus of books? (source: Google Ngram Viewer )