616231 divided by 28 
The aim is to understand the frequency of 28 in 616231.

On to step 1:
If we divide 6 by 28, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (1) from the dividend after 6, then repeat: 61 / 28

Step 2:
The number 28 fits into 61 2 times, leaving a remainder of 5.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 56 from 61 to get 5.
Append the next digit (6) from the dividend to 5 and continue with: 56 / 28

Step 3:
When dividing 56 by 28, we get 2 with a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 22.0
Subtracting 56 from 56 leaves us with 0.
Append the next digit (2) from the dividend to 0 and continue with: 2 / 28

On to step 4:
When dividing 2 by 28, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 220.0
If we subtract 0 from 2, we get 2.
Take the next digit (3) from the dividend and append it to 2, then repeat: 23 / 28

Going ahead to step 5:
When dividing 23 by 28, we get 0 with a remainder of 23.
Record the quotient 0 as the next digit in the result. 
Result so far: 2200.0
If we subtract 0 from 23, we get 23.
Bring next digit (1) of the dividend behind the 23 and repeat the process: 231 / 28

Moving on to step 6:
When dividing 231 by 28, we get 8 with a remainder of 7.
Use 8 as the next digit of our solution. 
Result so far: 22008.0
If we subtract 224 from 231, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 7:
28 can be fit into 70 2 times, resulting in a remainder of 14.
Record the quotient 2 as the next digit in the result. 
Result so far: 22008.2
Subtract 56 from 70 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 8:
28 can be fit into 140 5 times, resulting in a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 22008.25
Deduct 140 from 140 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 9:
0 divided by 28 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 22008.25
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 10:
The number 28 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 22008.25
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 22008.25, and the remainder is 0.0.