demolish vs knock together

demolish

verb
  • To destroy (of buildings, especially in a planned and intentional fashion). 

  • To defeat, refute, discredit, or consume utterly (as a theory, belief or opponent). 

knock together

verb
  • To assemble something quickly; to knock up. 

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