assemble vs topple

assemble

verb
  • To put together. 

  • To translate from assembly language to machine code. 

  • To gather as a group. 

topple

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

  • To overturn 

  • To overthrow something. 

  • To push or throw over 

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