still life vs technical drawing

still life

noun
  • A work of art depicting an arrangement of inanimate objects. 

  • A pattern that does not change from one generation to the next. 

technical drawing

noun
  • A depiction that relays the concept or idea for a physical object or group of physical objects. 

  • The act of producing such a picture. 

  • The art of producing such pictures. 

How often have the words still life and technical drawing occurred in a corpus of books? (source: Google Ngram Viewer )