designer vs slotting machine

designer

noun
  • A software tool for designing things. 

  • A person who designs something, or who designs things as a profession. 

  • A plotter or schemer. 

adj
  • Created by a designer, especially a fashion designer. 

slotting machine

noun
  • A reciprocating machine tool used to cut mortises and to shape openings. 

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