We look at the division of 198915 by 28 
The aim is to understand the frequency of 28 in 198915.

Let's proceed to step 1:
28 goes into 1 0 times with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 28

On to step 2:
If we divide 19 by 28, we get 0 and a remainder of 19.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 19, we end up with 19.
Take the next digit (8) from the dividend and append it to 19, then repeat: 198 / 28

Advancing to step 3:
28 goes into 198 7 times with a remainder of 2.
Put 7 as the next digit of the answer. 
Result so far: 7.0
If we subtract 196 from 198, we get 2.
Append the next digit (9) from the dividend to 2 and continue with: 29 / 28

Going ahead to step 4:
28 goes into 29 1 times with a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 71.0
Subtracting 28 from 29 leaves us with 1.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 28

Going ahead to step 5:
When dividing 11 by 28, we get 0 with a remainder of 11.
Put 0 as the next digit of the answer. 
Result so far: 710.0
If we take 0 away from 11, we end up with 11.
Fetch the next digit (5) from the dividend, attach it to 11 and continue: 115 / 28

Moving on to step 6:
115 divided by 28 is 4 with a remainder of 3.
The number 4 becomes the next digit in our result. 
Result so far: 7104.0
If we subtract 112 from 115, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 7:
28 goes into 30 1 times with a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 7104.1
If we subtract 28 from 30, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 8:
28 goes into 20 0 times with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 7104.1
Subtracting 0 from 20 leaves us 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.

Going ahead to step 9:
If we divide 200 by 28, we get 7 and a remainder of 4.
The number 7 becomes the next digit in our result. 
Result so far: 7104.107
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.

Let's proceed to step 10:
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: 7104.1071
Subtracting 28 from 40 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 11:
120 divided by 28 is 4 with a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 7104.10714
If we take 112 away from 120, we end up 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.

Advancing to step 12:
28 can be fit into 80 2 times, resulting in a remainder of 24.
Use 2 as the next digit of our solution. 
Result so far: 7104.107142
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.

Let's proceed to step 13:
28 goes into 240 8 times with a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 7104.1071428
Deduct 224 from 240 and we're left 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.

On to step 14:
If we divide 160 by 28, we get 5 and a remainder of 20.
The number 5 becomes the next digit in our result. 
Result so far: 7104.10714285
If we take 140 away from 160, we end up 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.

After the division, we end up with 7104.10714285 and a remainder of 2e-08.