int[] tally = new int[]{2, 2, 1, 1, 1, 1, 4, 1, 1, 4};
        int[] rate = new int[5]; // defaults to zero
        // rate[n] will be the frequency of value n
        // so n should be 0 to 4
        for (int index = 0; index < tally.length; index++) {
            int value = tally[index];
            if (value > -1 && value < rate.length) {
                rate[value]++;
            }
        }
        for (int index = 0; index < rate.length; index++) {
            System.out.println(index + "\t" + rate[index]);
        }