We look at the division of 78130309 by 524 
The aim is to understand the frequency of 524 in 78130309.

Going ahead to step 1:
The number 524 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 524

Advancing to step 2:
524 can be fit into 78 0 times, resulting in a remainder of 78.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 78 after subtracting 0 from 78.
Include the next digit (1) from the dividend after 78, then repeat: 781 / 524

Step 3:
When dividing 781 by 524, we get 1 with a remainder of 257.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 524 away from 781, we end up with 257.
Grab the next digit (3) from the dividend, add it to 257, then carry on: 2573 / 524

Moving on to step 4:
If we divide 2573 by 524, we get 4 and a remainder of 477.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
Subtracting 2096 from 2573 leaves us with 477.
Include the next digit (0) from the dividend after 477, then repeat: 4770 / 524

Advancing to step 5:
524 goes into 4770 9 times with a remainder of 54.
The next digit of our result is 9. 
Result so far: 149.0
The remainder is 54 after subtracting 4716 from 4770.
Bring next digit (3) of the dividend behind the 54 and repeat the process: 543 / 524

On to step 6:
543 divided by 524 is 1 with a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 1491.0
If we subtract 524 from 543, we get 19.
Bring next digit (0) of the dividend behind the 19 and repeat the process: 190 / 524

On to step 7:
If we divide 190 by 524, we get 0 and a remainder of 190.
Put 0 as the next digit of the answer. 
Result so far: 14910.0
The remainder is 190 after subtracting 0 from 190.
Take the next digit (9) from the dividend and append it to 190, then repeat: 1909 / 524

Advancing to step 8:
524 goes into 1909 3 times with a remainder of 337.
The next digit of our result is 3. 
Result so far: 149103.0
If we take 1572 away from 1909, we end up with 337.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3370, and continue the process.

On to step 9:
524 goes into 3370 6 times with a remainder of 226.
The next digit of our result is 6. 
Result so far: 149103.6
If we take 3144 away from 3370, we end up with 226.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2260, and continue the process.

On to step 10:
If we divide 2260 by 524, we get 4 and a remainder of 164.
Use 4 as the next digit of our solution. 
Result so far: 149103.64
Subtract 2096 from 2260 to get 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Advancing to step 11:
When dividing 1640 by 524, we get 3 with a remainder of 68.
Write down 3 as next digit of the result. 
Result so far: 149103.643
Subtract 1572 from 1640 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Step 12:
524 can be fit into 680 1 times, resulting in a remainder of 156.
Put 1 as the next digit of the answer. 
Result so far: 149103.6431
If we subtract 524 from 680, we get 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Moving on to step 13:
If we divide 1560 by 524, we get 2 and a remainder of 512.
Put 2 as the next digit of the answer. 
Result so far: 149103.64312
If we subtract 1048 from 1560, we get 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

Moving on to step 14:
5120 divided by 524 is 9 with a remainder of 404.
Put 9 as the next digit of the answer. 
Result so far: 149103.643129
Subtract 4716 from 5120 to get 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

Let's proceed to step 15:
If we divide 4040 by 524, we get 7 and a remainder of 372.
Put 7 as the next digit of the answer. 
Result so far: 149103.6431297
If we take 3668 away from 4040, we end up with 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

Step 16:
If we divide 3720 by 524, we get 7 and a remainder of 52.
The next digit of our result is 7. 
Result so far: 149103.64312977
The remainder is 52 after subtracting 3668 from 3720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

The final outcome is 149103.64312977, with a leftover of 5.2e-08.