interfacing vs interlining

interfacing

noun
  • A layer of fabric inserted between other layers of a garment to provide stiffening 

interlining

noun
  • A cloth lining between the outer and inner layers of a garment. 

  • Correction or alteration by writing between the lines; interlineation. 

  • The scheduling of vehicles to operate more than one route, or the selling of tickets for a trip across multiple carriers 

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