/HISTOGRAM
       /NOHISTOGRAM (default)

          The /HISTOGRAM qualifier is used when showing the
          fragmentation state of a volume. It generates two
          histograms. The first plots the number of files
          against the number of extents per file and provides
          information about how many files are fragmented and
          how badly they are fragmented. The second histogram
          plots the number of freespace extents (holes) against
          the size of these freespace extents. It provides
          information about how many freespace extents are on
          the volume and their sizes.