39813130 divided by 520 
The aim is to understand the frequency of 520 in 39813130.

Step 1:
520 goes into 3 0 times with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 520

Let's proceed to step 2:
The number 520 fits into 39 0 times, leaving a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 39 leaves us with 39.
Bring next digit (8) of the dividend behind the 39 and repeat the process: 398 / 520

On to step 3:
520 goes into 398 0 times with a remainder of 398.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 398 and we're left with 398.
Take the next digit (1) from the dividend and append it to 398, then repeat: 3981 / 520

Advancing to step 4:
The number 520 fits into 3981 7 times, leaving a remainder of 341.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
If we take 3640 away from 3981, we end up with 341.
Bring next digit (3) of the dividend behind the 341 and repeat the process: 3413 / 520

On to step 5:
The number 520 fits into 3413 6 times, leaving a remainder of 293.
Use 6 as the next digit of our solution. 
Result so far: 76.0
Deduct 3120 from 3413 and we're left with 293.
Append the next digit (1) from the dividend to 293 and continue with: 2931 / 520

Step 6:
When dividing 2931 by 520, we get 5 with a remainder of 331.
Put 5 as the next digit of the answer. 
Result so far: 765.0
Deduct 2600 from 2931 and we're left with 331.
Include the next digit (3) from the dividend after 331, then repeat: 3313 / 520

Moving on to step 7:
3313 divided by 520 is 6 with a remainder of 193.
The number 6 becomes the next digit in our result. 
Result so far: 7656.0
If we subtract 3120 from 3313, we get 193.
Take the next digit (0) from the dividend and append it to 193, then repeat: 1930 / 520

Going ahead to step 8:
If we divide 1930 by 520, we get 3 and a remainder of 370.
The number 3 becomes the next digit in our result. 
Result so far: 76563.0
Subtract 1560 from 1930 to get 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Step 9:
520 can be fit into 3700 7 times, resulting in a remainder of 60.
Write down 7 as next digit of the result. 
Result so far: 76563.7
The remainder is 60 after subtracting 3640 from 3700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 10:
600 divided by 520 is 1 with a remainder of 80.
Record the quotient 1 as the next digit in the result. 
Result so far: 76563.71
If we take 520 away from 600, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 11:
The number 520 fits into 800 1 times, leaving a remainder of 280.
Write down 1 as next digit of the result. 
Result so far: 76563.711
Subtract 520 from 800 to get 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

In conclusion, the division gives 76563.711 with a balance of 0.028.