intarsia vs photomosaic

intarsia

noun
  • A knitted design resembling a mosaic. 

  • A decorative form of Italian wood inlaying. 

photomosaic

noun
  • A composite image made of individual photographs, normally of the same shape and size, placed together - to show a panoramic view etc. 

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