tip over vs totter

tip over

verb
  • (to cause) to topple over and fall 

noun
  • An action where the goalkeeper deflects the ball over the crossbar. 

totter

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

  • To be on the brink of collapse. 

noun
  • An unsteady movement or gait. 

How often have the words tip over and totter occurred in a corpus of books? (source: Google Ngram Viewer )