We look at the division of 39958365 by 204 
The aim is to understand the frequency of 204 in 39958365.

Moving on to step 1:
204 goes into 3 0 times with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 204

Going ahead to step 2:
If we divide 39 by 204, we get 0 and a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 39 leaves us with 39.
Take the next digit (9) from the dividend and append it to 39, then repeat: 399 / 204

Let's proceed to step 3:
When dividing 399 by 204, we get 1 with a remainder of 195.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 204 from 399 leaves us with 195.
Take the next digit (5) from the dividend and append it to 195, then repeat: 1955 / 204

Step 4:
204 can be fit into 1955 9 times, resulting in a remainder of 119.
Use 9 as the next digit of our solution. 
Result so far: 19.0
Deduct 1836 from 1955 and we're left with 119.
Append the next digit (8) from the dividend to 119 and continue with: 1198 / 204

Advancing to step 5:
204 can be fit into 1198 5 times, resulting in a remainder of 178.
Use 5 as the next digit of our solution. 
Result so far: 195.0
Subtracting 1020 from 1198 leaves us with 178.
Include the next digit (3) from the dividend after 178, then repeat: 1783 / 204

Advancing to step 6:
When dividing 1783 by 204, we get 8 with a remainder of 151.
Use 8 as the next digit of our solution. 
Result so far: 1958.0
If we take 1632 away from 1783, we end up with 151.
Append the next digit (6) from the dividend to 151 and continue with: 1516 / 204

Moving on to step 7:
1516 divided by 204 is 7 with a remainder of 88.
Record the quotient 7 as the next digit in the result. 
Result so far: 19587.0
If we take 1428 away from 1516, we end up with 88.
Bring next digit (5) of the dividend behind the 88 and repeat the process: 885 / 204

Moving on to step 8:
204 goes into 885 4 times with a remainder of 69.
The number 4 becomes the next digit in our result. 
Result so far: 195874.0
The remainder is 69 after subtracting 816 from 885.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Step 9:
When dividing 690 by 204, we get 3 with a remainder of 78.
Put 3 as the next digit of the answer. 
Result so far: 195874.3
If we subtract 612 from 690, we get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Step 10:
The number 204 fits into 780 3 times, leaving a remainder of 168.
The next digit of our result is 3. 
Result so far: 195874.33
If we subtract 612 from 780, we get 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

After the division, we end up with 195874.33 and a remainder of 0.168.