We look at the division of 12207 by 28 
The aim is to understand the frequency of 28 in 12207.

Going ahead to step 1:
1 divided by 28 is 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 28

Moving on to step 2:
When dividing 12 by 28, we get 0 with a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Include the next digit (2) from the dividend after 12, then repeat: 122 / 28

Going ahead to step 3:
28 can be fit into 122 4 times, resulting in a remainder of 10.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we subtract 112 from 122, we get 10.
Grab the next digit (0) from the dividend, add it to 10, then carry on: 100 / 28

On to step 4:
The number 28 fits into 100 3 times, leaving a remainder of 16.
The next digit of our result is 3. 
Result so far: 43.0
Deduct 84 from 100 and we're left with 16.
Append the next digit (7) from the dividend to 16 and continue with: 167 / 28

Advancing to step 5:
28 goes into 167 5 times with a remainder of 27.
Put 5 as the next digit of the answer. 
Result so far: 435.0
Subtracting 140 from 167 leaves us 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.

Advancing to step 6:
The number 28 fits into 270 9 times, leaving a remainder of 18.
Use 9 as the next digit of our solution. 
Result so far: 435.9
Subtract 252 from 270 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 7:
If we divide 180 by 28, we get 6 and a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 435.96
If we subtract 168 from 180, we 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 8:
28 goes into 120 4 times with a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 435.964
Subtracting 112 from 120 leaves us 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.

On to step 9:
28 can be fit into 80 2 times, resulting in a remainder of 24.
Put 2 as the next digit of the answer. 
Result so far: 435.9642
The remainder is 24 after subtracting 56 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 10:
The number 28 fits into 240 8 times, leaving a remainder of 16.
Put 8 as the next digit of the answer. 
Result so far: 435.96428
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.

Advancing to step 11:
28 can be fit into 160 5 times, resulting in a remainder of 20.
The next digit of our result is 5. 
Result so far: 435.964285
Subtract 140 from 160 to 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.

Let's proceed to step 12:
When dividing 200 by 28, we get 7 with a remainder of 4.
The next digit of our result is 7. 
Result so far: 435.9642857
Subtracting 196 from 200 leaves us 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.

Going ahead to step 13:
If we divide 40 by 28, we get 1 and a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 435.96428571
If we subtract 28 from 40, we 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.

The final outcome is 435.96428571, with a leftover of 1.2e-08.