blueprint vs draftsmanship

blueprint

noun
  • A detailed technical drawing (now often in some electronically storable and transmissible form). 

  • A print produced with this process. 

  • Any detailed plan, whether literal or figurative. 

  • A type of paper-based reproduction process producing white-on-blue images, used primarily for technical and architecture's drawings, now largely replaced by other technologies. 

verb
  • To make a blueprint for. 

  • To make a detailed operational plan for. 

draftsmanship

noun
  • the skill of drawing 

  • the art or craft of a draftsman 

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