We look at the division of 40280568 by 513 
The aim is to understand the frequency of 513 in 40280568.

Step 1:
The number 513 fits into 4 0 times, leaving a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 513

Let's proceed to step 2:
40 divided by 513 is 0 with a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 40 to get 40.
Bring next digit (2) of the dividend behind the 40 and repeat the process: 402 / 513

Going ahead to step 3:
402 divided by 513 is 0 with a remainder of 402.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 402 to get 402.
Grab the next digit (8) from the dividend, add it to 402, then carry on: 4028 / 513

Advancing to step 4:
When dividing 4028 by 513, we get 7 with a remainder of 437.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtracting 3591 from 4028 leaves us with 437.
Bring next digit (0) of the dividend behind the 437 and repeat the process: 4370 / 513

Let's proceed to step 5:
When dividing 4370 by 513, we get 8 with a remainder of 266.
Record the quotient 8 as the next digit in the result. 
Result so far: 78.0
If we subtract 4104 from 4370, we get 266.
Grab the next digit (5) from the dividend, add it to 266, then carry on: 2665 / 513

Moving on to step 6:
If we divide 2665 by 513, we get 5 and a remainder of 100.
The number 5 becomes the next digit in our result. 
Result so far: 785.0
The remainder is 100 after subtracting 2565 from 2665.
Grab the next digit (6) from the dividend, add it to 100, then carry on: 1006 / 513

Going ahead to step 7:
513 goes into 1006 1 times with a remainder of 493.
Put 1 as the next digit of the answer. 
Result so far: 7851.0
The remainder is 493 after subtracting 513 from 1006.
Bring next digit (8) of the dividend behind the 493 and repeat the process: 4938 / 513

Moving on to step 8:
The number 513 fits into 4938 9 times, leaving a remainder of 321.
Write down 9 as next digit of the result. 
Result so far: 78519.0
Deduct 4617 from 4938 and we're left with 321.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3210, and continue the process.

Step 9:
513 can be fit into 3210 6 times, resulting in a remainder of 132.
Use 6 as the next digit of our solution. 
Result so far: 78519.6
Subtract 3078 from 3210 to get 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Step 10:
The number 513 fits into 1320 2 times, leaving a remainder of 294.
Record the quotient 2 as the next digit in the result. 
Result so far: 78519.62
If we subtract 1026 from 1320, we get 294.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2940, and continue the process.

Moving on to step 11:
2940 divided by 513 is 5 with a remainder of 375.
Use 5 as the next digit of our solution. 
Result so far: 78519.625
Subtract 2565 from 2940 to get 375.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3750, and continue the process.

Let's proceed to step 12:
513 goes into 3750 7 times with a remainder of 159.
Put 7 as the next digit of the answer. 
Result so far: 78519.6257
If we take 3591 away from 3750, we end up with 159.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1590, and continue the process.

Going ahead to step 13:
513 can be fit into 1590 3 times, resulting in a remainder of 51.
Put 3 as the next digit of the answer. 
Result so far: 78519.62573
If we subtract 1539 from 1590, we get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 14:
The number 513 fits into 510 0 times, leaving a remainder of 510.
Put 0 as the next digit of the answer. 
Result so far: 78519.62573
Subtracting 0 from 510 leaves us with 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Advancing to step 15:
5100 divided by 513 is 9 with a remainder of 483.
The next digit of our result is 9. 
Result so far: 78519.6257309
Subtracting 4617 from 5100 leaves us with 483.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4830, and continue the process.

Going ahead to step 16:
When dividing 4830 by 513, we get 9 with a remainder of 213.
Use 9 as the next digit of our solution. 
Result so far: 78519.62573099
The remainder is 213 after subtracting 4617 from 4830.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2130, and continue the process.

After the division, we end up with 78519.62573099 and a remainder of 2.13e-07.