391754 ÷ 28 
The aim is to understand the frequency of 28 in 391754.

Step 1:
When dividing 3 by 28, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 28

Let's proceed to step 2:
If we divide 39 by 28, we get 1 and a remainder of 11.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 11 after subtracting 28 from 39.
Grab the next digit (1) from the dividend, add it to 11, then carry on: 111 / 28

Step 3:
28 goes into 111 3 times with a remainder of 27.
Use 3 as the next digit of our solution. 
Result so far: 13.0
If we subtract 84 from 111, we get 27.
Fetch the next digit (7) from the dividend, attach it to 27 and continue: 277 / 28

Step 4:
When dividing 277 by 28, we get 9 with a remainder of 25.
Use 9 as the next digit of our solution. 
Result so far: 139.0
If we subtract 252 from 277, we get 25.
Grab the next digit (5) from the dividend, add it to 25, then carry on: 255 / 28

Going ahead to step 5:
The number 28 fits into 255 9 times, leaving a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 1399.0
Subtracting 252 from 255 leaves us with 3.
Append the next digit (4) from the dividend to 3 and continue with: 34 / 28

On to step 6:
When dividing 34 by 28, we get 1 with a remainder of 6.
The number 1 becomes the next digit in our result. 
Result so far: 13991.0
If we subtract 28 from 34, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 7:
28 goes into 60 2 times with a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 13991.2
The remainder is 4 after subtracting 56 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 8:
When dividing 40 by 28, we get 1 with a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 13991.21
Deduct 28 from 40 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 9:
The number 28 fits into 120 4 times, leaving a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 13991.214
Subtract 112 from 120 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 10:
80 divided by 28 is 2 with a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 13991.2142
Subtract 56 from 80 to 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.

Moving on to step 11:
28 can be fit into 240 8 times, resulting in a remainder of 16.
Put 8 as the next digit of the answer. 
Result so far: 13991.21428
The remainder is 16 after subtracting 224 from 240.
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 12:
When dividing 160 by 28, we get 5 with a remainder of 20.
Put 5 as the next digit of the answer. 
Result so far: 13991.214285
If we subtract 140 from 160, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 13:
200 divided by 28 is 7 with a remainder of 4.
Put 7 as the next digit of the answer. 
Result so far: 13991.2142857
If we take 196 away from 200, we end up 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.

Moving on to step 14:
28 goes into 40 1 times with a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 13991.21428571
If we take 28 away from 40, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Our division results in 13991.21428571 with a remaining 1.2e-08.