We look at the division of 12102949 by 204 
The aim is to understand the frequency of 204 in 12102949.

On to step 1:
204 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 204

On to step 2:
12 divided by 204 is 0 with a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Append the next digit (1) from the dividend to 12 and continue with: 121 / 204

Going ahead to step 3:
If we divide 121 by 204, we get 0 and a remainder of 121.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 121 leaves us with 121.
Grab the next digit (0) from the dividend, add it to 121, then carry on: 1210 / 204

Going ahead to step 4:
The number 204 fits into 1210 5 times, leaving a remainder of 190.
The next digit of our result is 5. 
Result so far: 5.0
If we take 1020 away from 1210, we end up with 190.
Append the next digit (2) from the dividend to 190 and continue with: 1902 / 204

Step 5:
When dividing 1902 by 204, we get 9 with a remainder of 66.
The number 9 becomes the next digit in our result. 
Result so far: 59.0
Deduct 1836 from 1902 and we're left with 66.
Bring next digit (9) of the dividend behind the 66 and repeat the process: 669 / 204

Advancing to step 6:
If we divide 669 by 204, we get 3 and a remainder of 57.
The next digit of our result is 3. 
Result so far: 593.0
If we subtract 612 from 669, we get 57.
Take the next digit (4) from the dividend and append it to 57, then repeat: 574 / 204

Going ahead to step 7:
When dividing 574 by 204, we get 2 with a remainder of 166.
The next digit of our result is 2. 
Result so far: 5932.0
Deduct 408 from 574 and we're left with 166.
Fetch the next digit (9) from the dividend, attach it to 166 and continue: 1669 / 204

On to step 8:
204 goes into 1669 8 times with a remainder of 37.
Put 8 as the next digit of the answer. 
Result so far: 59328.0
The remainder is 37 after subtracting 1632 from 1669.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 9:
204 can be fit into 370 1 times, resulting in a remainder of 166.
Write down 1 as next digit of the result. 
Result so far: 59328.1
If we take 204 away from 370, we end up with 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

Let's proceed to step 10:
The number 204 fits into 1660 8 times, leaving a remainder of 28.
The next digit of our result is 8. 
Result so far: 59328.18
If we take 1632 away from 1660, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 11:
When dividing 280 by 204, we get 1 with a remainder of 76.
Write down 1 as next digit of the result. 
Result so far: 59328.181
Subtracting 204 from 280 leaves us with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 12:
204 can be fit into 760 3 times, resulting in a remainder of 148.
Put 3 as the next digit of the answer. 
Result so far: 59328.1813
The remainder is 148 after subtracting 612 from 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Moving on to step 13:
204 goes into 1480 7 times with a remainder of 52.
The next digit of our result is 7. 
Result so far: 59328.18137
Subtracting 1428 from 1480 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Let's proceed to step 14:
The number 204 fits into 520 2 times, leaving a remainder of 112.
The number 2 becomes the next digit in our result. 
Result so far: 59328.181372
If we subtract 408 from 520, we get 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Step 15:
The number 204 fits into 1120 5 times, leaving a remainder of 100.
Put 5 as the next digit of the answer. 
Result so far: 59328.1813725
Subtracting 1020 from 1120 leaves us with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Advancing to step 16:
If we divide 1000 by 204, we get 4 and a remainder of 184.
Use 4 as the next digit of our solution. 
Result so far: 59328.18137254
Deduct 816 from 1000 and we're left with 184.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

The final outcome is 59328.18137254, with a leftover of 1.84e-07.