knock together vs put together

knock together

verb
  • To assemble something quickly; to knock up. 

put together

verb
  • To assemble, construct, build, or formulate. 

  • To gather one's thoughts and come to conclusions. 

adj
  • Stable and sound psychologically and hence in other respects; competent and responsible. 

  • In total. 

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