evolve vs knock down

evolve

verb
  • To cause something to change or transform. 

  • To change; transform. 

  • Of a population, to acquire or develop (a trait) in the process of biological evolution. 

  • To give off (gas, such as oxygen or carbon dioxide during a reaction). 

  • To move in regular procession through a system. 

  • To come into being; develop. 

  • Of a trait, to develop within a population via biological evolution. 

  • Of a population, to change genetic composition over successive generations through the process of evolution. 

knock down

verb
  • To hit or knock (something or someone), intentionally or accidentally, so that it falls. 

  • To drink fast. 

  • To disassemble for shipment. 

  • To reduce the price of. 

  • To demolish. 

  • To approve a drinking toast by banging glasses on the table. 

  • At an auction, to declare (something) sold with a blow from the gavel. 

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