patchwork vs photomosaic

patchwork

noun
  • A work, such as a blanket, composed of many different colors and shapes, sewn together to make an interesting whole. 

  • A state of regulations whose constituents have an opaque scope of application because of their questionable delimitation with regard to each other. 

  • Any kind of creation that utilizes many different aspects to create one whole piece. 

verb
  • To create a patchwork from pieces of fabric. 

  • To assemble from a variety of sources; to cobble together. 

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 patchwork and photomosaic occurred in a corpus of books? (source: Google Ngram Viewer )