We're dividing 413139 by 28 
The aim is to understand the frequency of 28 in 413139.

Advancing to step 1:
The number 28 fits into 4 0 times, leaving a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Fetch the next digit (1) from the dividend, attach it to 4 and continue: 41 / 28

On to step 2:
28 goes into 41 1 times with a remainder of 13.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 28 away from 41, we end up with 13.
Grab the next digit (3) from the dividend, add it to 13, then carry on: 133 / 28

Let's proceed to step 3:
When dividing 133 by 28, we get 4 with a remainder of 21.
Put 4 as the next digit of the answer. 
Result so far: 14.0
If we subtract 112 from 133, we get 21.
Take the next digit (1) from the dividend and append it to 21, then repeat: 211 / 28

Going ahead to step 4:
If we divide 211 by 28, we get 7 and a remainder of 15.
The number 7 becomes the next digit in our result. 
Result so far: 147.0
Subtracting 196 from 211 leaves us with 15.
Fetch the next digit (3) from the dividend, attach it to 15 and continue: 153 / 28

Advancing to step 5:
28 can be fit into 153 5 times, resulting in a remainder of 13.
The next digit of our result is 5. 
Result so far: 1475.0
If we take 140 away from 153, we end up with 13.
Take the next digit (9) from the dividend and append it to 13, then repeat: 139 / 28

Step 6:
139 divided by 28 is 4 with a remainder of 27.
The next digit of our result is 4. 
Result so far: 14754.0
Deduct 112 from 139 and we're left with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Let's proceed to step 7:
The number 28 fits into 270 9 times, leaving a remainder of 18.
The next digit of our result is 9. 
Result so far: 14754.9
Deduct 252 from 270 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 8:
The number 28 fits into 180 6 times, leaving a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 14754.96
Subtracting 168 from 180 leaves us 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.

Let's proceed to step 9:
120 divided by 28 is 4 with a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 14754.964
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.

Let's proceed to step 10:
If we divide 80 by 28, we get 2 and a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 14754.9642
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.

Let's proceed to step 11:
When dividing 240 by 28, we get 8 with a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 14754.96428
Subtracting 224 from 240 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 12:
28 goes into 160 5 times with a remainder of 20.
The next digit of our result is 5. 
Result so far: 14754.964285
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.

Advancing to step 13:
200 divided by 28 is 7 with a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 14754.9642857
If we subtract 196 from 200, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 14:
The number 28 fits into 40 1 times, leaving a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 14754.96428571
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.

The final result is 14754.96428571 with a remainder of 1.2e-08.