bargello vs tracery

bargello

noun
  • A police or military chief in medieval Italian comuni. 

  • An Italian medieval police or military headquarters. 

  • A type of needlepoint embroidery consisting of upright flat stitches laid in a pattern to create zigzag or flamelike motifs, or similar motifs created in quilts. 

tracery

noun
  • Bars or ribs, usually of stone or wood, or other material, that subdivide an opening or stand in relief against a door or wall as an ornamental feature. 

  • A delicate interlacing of lines reminiscent of the architectural ornament. 

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