We're dividing 391130 by 28 
The aim is to understand the frequency of 28 in 391130.

On to step 1:
28 goes into 3 0 times with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 28

Let's proceed to step 2:
The number 28 fits into 39 1 times, leaving a remainder of 11.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 28 from 39 and we're left with 11.
Take the next digit (1) from the dividend and append it to 11, then repeat: 111 / 28

Moving on to step 3:
If we divide 111 by 28, we get 3 and a remainder of 27.
The next digit of our result is 3. 
Result so far: 13.0
Subtract 84 from 111 to get 27.
Grab the next digit (1) from the dividend, add it to 27, then carry on: 271 / 28

Moving on to step 4:
When dividing 271 by 28, we get 9 with a remainder of 19.
The next digit of our result is 9. 
Result so far: 139.0
Subtracting 252 from 271 leaves us with 19.
Bring next digit (3) of the dividend behind the 19 and repeat the process: 193 / 28

Step 5:
28 can be fit into 193 6 times, resulting in a remainder of 25.
Put 6 as the next digit of the answer. 
Result so far: 1396.0
Subtract 168 from 193 to get 25.
Grab the next digit (0) from the dividend, add it to 25, then carry on: 250 / 28

Advancing to step 6:
28 goes into 250 8 times with a remainder of 26.
The number 8 becomes the next digit in our result. 
Result so far: 13968.0
Subtracting 224 from 250 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 7:
28 goes into 260 9 times with a remainder of 8.
The next digit of our result is 9. 
Result so far: 13968.9
Deduct 252 from 260 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 8:
80 divided by 28 is 2 with a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 13968.92
If we take 56 away from 80, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 9:
The number 28 fits into 240 8 times, leaving a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 13968.928
If we subtract 224 from 240, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 10:
28 can be fit into 160 5 times, resulting in a remainder of 20.
Record the quotient 5 as the next digit in the result. 
Result so far: 13968.9285
The remainder is 20 after subtracting 140 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 11:
When dividing 200 by 28, we get 7 with a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 13968.92857
Deduct 196 from 200 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 12:
40 divided by 28 is 1 with a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 13968.928571
The remainder is 12 after subtracting 28 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 13:
120 divided by 28 is 4 with a remainder of 8.
The next digit of our result is 4. 
Result so far: 13968.9285714
Deduct 112 from 120 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 14:
28 can be fit into 80 2 times, resulting in a remainder of 24.
Record the quotient 2 as the next digit in the result. 
Result so far: 13968.92857142
If we subtract 56 from 80, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

The final outcome is 13968.92857142, with a leftover of 2.4e-08.