We look at the division of 813769 by 28 
The aim is to understand the frequency of 28 in 813769.

Moving on to step 1:
If we divide 8 by 28, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 28

On to step 2:
81 divided by 28 is 2 with a remainder of 25.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 56 from 81 and we're left with 25.
Grab the next digit (3) from the dividend, add it to 25, then carry on: 253 / 28

Going ahead to step 3:
When dividing 253 by 28, we get 9 with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 29.0
Subtract 252 from 253 to get 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 28

Let's proceed to step 4:
28 can be fit into 17 0 times, resulting in a remainder of 17.
Record the quotient 0 as the next digit in the result. 
Result so far: 290.0
Subtracting 0 from 17 leaves us with 17.
Take the next digit (6) from the dividend and append it to 17, then repeat: 176 / 28

Advancing to step 5:
176 divided by 28 is 6 with a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 2906.0
Subtract 168 from 176 to get 8.
Fetch the next digit (9) from the dividend, attach it to 8 and continue: 89 / 28

Step 6:
If we divide 89 by 28, we get 3 and a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 29063.0
The remainder is 5 after subtracting 84 from 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 7:
If we divide 50 by 28, we get 1 and a remainder of 22.
Put 1 as the next digit of the answer. 
Result so far: 29063.1
If we subtract 28 from 50, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 8:
28 can be fit into 220 7 times, resulting in a remainder of 24.
Record the quotient 7 as the next digit in the result. 
Result so far: 29063.17
If we subtract 196 from 220, 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.

Going ahead to step 9:
28 can be fit into 240 8 times, resulting in a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 29063.178
If we take 224 away from 240, we end up 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.

Moving on to step 10:
The number 28 fits into 160 5 times, leaving a remainder of 20.
The next digit of our result is 5. 
Result so far: 29063.1785
Deduct 140 from 160 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 11:
28 goes into 200 7 times with a remainder of 4.
Put 7 as the next digit of the answer. 
Result so far: 29063.17857
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.

Let's proceed to step 12:
28 can be fit into 40 1 times, resulting in a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 29063.178571
Subtract 28 from 40 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 13:
120 divided by 28 is 4 with a remainder of 8.
Put 4 as the next digit of the answer. 
Result so far: 29063.1785714
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.

Going ahead to step 14:
80 divided by 28 is 2 with a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 29063.17857142
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 29063.17857142, with a leftover of 2.4e-08.