construct vs knock together

construct

verb
  • To build or form (something) by assembling parts. 

  • To draw (a geometric figure) by following precise specifications and using geometric tools and techniques. 

  • To build (a sentence, an argument, etc.) by arranging words or ideas. 

noun
  • A concept or model. 

  • Something constructed from parts. 

  • A segment of nucleic acid, created artificially, for transplantation into a target cell or tissue. 

knock together

verb
  • To assemble something quickly; to knock up. 

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