@Override
		public long[] frequencies() {
			return frequencies.clone();
		}
Represents a list of buckets which are part of a histogram. The buckets
of this object are non-overlapping and have no gaps.
<pre>{@code
   min                                     max
    +----+----+----+----+----+----+----+----+
    | 1  | 2  | 3  | 4  |  5 | 6  | 7  |  8 |
    +----+----+----+----+----+----+----+----+
}</pre>
jenetics.incubator/src/main/java/io/jenetics/incubator/stat/Histogram.java