Let's divide 51016109 by 515
The aim is to understand the frequency of 515 in 51016109.

Moving on to step 1:
If we divide 5 by 515, we get 0 and a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 515

Step 2:
When dividing 51 by 515, we get 0 with a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Include the next digit (0) from the dividend after 51, then repeat: 510 / 515

Let's proceed to step 3:
510 divided by 515 is 0 with a remainder of 510.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 510, we end up with 510.
Bring next digit (1) of the dividend behind the 510 and repeat the process: 5101 / 515

On to step 4:
The number 515 fits into 5101 9 times, leaving a remainder of 466.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtracting 4635 from 5101 leaves us with 466.
Append the next digit (6) from the dividend to 466 and continue with: 4666 / 515

Going ahead to step 5:
4666 divided by 515 is 9 with a remainder of 31.
Put 9 as the next digit of the answer. 
Result so far: 99.0
If we subtract 4635 from 4666, we get 31.
Include the next digit (1) from the dividend after 31, then repeat: 311 / 515

Going ahead to step 6:
When dividing 311 by 515, we get 0 with a remainder of 311.
The next digit of our result is 0. 
Result so far: 990.0
If we take 0 away from 311, we end up with 311.
Append the next digit (0) from the dividend to 311 and continue with: 3110 / 515

Step 7:
3110 divided by 515 is 6 with a remainder of 20.
Record the quotient 6 as the next digit in the result. 
Result so far: 9906.0
The remainder is 20 after subtracting 3090 from 3110.
Fetch the next digit (9) from the dividend, attach it to 20 and continue: 209 / 515

Let's proceed to step 8:
The number 515 fits into 209 0 times, leaving a remainder of 209.
Put 0 as the next digit of the answer. 
Result so far: 99060.0
Subtracting 0 from 209 leaves us with 209.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2090, and continue the process.

Moving on to step 9:
515 can be fit into 2090 4 times, resulting in a remainder of 30.
Put 4 as the next digit of the answer. 
Result so far: 99060.4
If we take 2060 away from 2090, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 10:
300 divided by 515 is 0 with a remainder of 300.
Write down 0 as next digit of the result. 
Result so far: 99060.4
Deduct 0 from 300 and we're left with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

On to step 11:
The number 515 fits into 3000 5 times, leaving a remainder of 425.
Put 5 as the next digit of the answer. 
Result so far: 99060.405
If we take 2575 away from 3000, we end up with 425.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

Step 12:
When dividing 4250 by 515, we get 8 with a remainder of 130.
Use 8 as the next digit of our solution. 
Result so far: 99060.4058
If we subtract 4120 from 4250, we get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

On to step 13:
515 goes into 1300 2 times with a remainder of 270.
Put 2 as the next digit of the answer. 
Result so far: 99060.40582
Deduct 1030 from 1300 and we're left with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Let's proceed to step 14:
When dividing 2700 by 515, we get 5 with a remainder of 125.
The next digit of our result is 5. 
Result so far: 99060.405825
Deduct 2575 from 2700 and we're left with 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

On to step 15:
515 goes into 1250 2 times with a remainder of 220.
The next digit of our result is 2. 
Result so far: 99060.4058252
If we subtract 1030 from 1250, we get 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

On to step 16:
When dividing 2200 by 515, we get 4 with a remainder of 140.
Use 4 as the next digit of our solution. 
Result so far: 99060.40582524
Deduct 2060 from 2200 and we're left with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

The final result is 99060.40582524 with a remainder of 1.4e-07.