topple vs zig

topple

verb
  • To overthrow something. 

  • To overturn 

  • To totter and fall, or to lean as if about to do so. 

  • To push or throw over 

zig

verb
  • To make such a turn. 

noun
  • A sudden or sharp turn or change of direction. 

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