Let's divide 191815 by 28
The aim is to understand the frequency of 28 in 191815.

On to step 1:
The number 28 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 28

Step 2:
28 goes into 19 0 times with a remainder of 19.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 19, we get 19.
Take the next digit (1) from the dividend and append it to 19, then repeat: 191 / 28

Let's proceed to step 3:
191 divided by 28 is 6 with a remainder of 23.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we take 168 away from 191, we end up with 23.
Include the next digit (8) from the dividend after 23, then repeat: 238 / 28

Step 4:
If we divide 238 by 28, we get 8 and a remainder of 14.
Put 8 as the next digit of the answer. 
Result so far: 68.0
Deduct 224 from 238 and we're left with 14.
Take the next digit (1) from the dividend and append it to 14, then repeat: 141 / 28

Advancing to step 5:
28 can be fit into 141 5 times, resulting in a remainder of 1.
Write down 5 as next digit of the result. 
Result so far: 685.0
Subtract 140 from 141 to get 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 28

Advancing to step 6:
28 can be fit into 15 0 times, resulting in a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 6850.0
If we take 0 away from 15, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 7:
The number 28 fits into 150 5 times, leaving a remainder of 10.
The next digit of our result is 5. 
Result so far: 6850.5
If we subtract 140 from 150, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
28 goes into 100 3 times with a remainder of 16.
Record the quotient 3 as the next digit in the result. 
Result so far: 6850.53
Deduct 84 from 100 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.

Let's proceed to step 9:
28 goes into 160 5 times with a remainder of 20.
The next digit of our result is 5. 
Result so far: 6850.535
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.

On to step 10:
When dividing 200 by 28, we get 7 with a remainder of 4.
The number 7 becomes the next digit in our result. 
Result so far: 6850.5357
Subtract 196 from 200 to 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.

Going ahead to step 11:
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: 6850.53571
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.

Advancing to step 12:
120 divided by 28 is 4 with a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 6850.535714
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.

On to step 13:
80 divided by 28 is 2 with a remainder of 24.
Use 2 as the next digit of our solution. 
Result so far: 6850.5357142
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.

Going ahead to step 14:
28 goes into 240 8 times with a remainder of 16.
Put 8 as the next digit of the answer. 
Result so far: 6850.53571428
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.

Our division results in 6850.53571428 with a remaining 1.6e-08.