braille vs diamond cutters

braille

noun
  • A system of writing in which letters and some combinations of letters are represented by raised dots arranged in three rows of two dots each and are read by the blind and partially sighted using the fingertips. 

verb
  • To write in, or convert into, the braille writing system. 

  • to identify something by touch. 

adj
  • Of, relating to or written in braille. 

diamond cutters

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