51149231 ÷ 815 
The aim is to understand the frequency of 815 in 51149231.

Advancing to step 1:
If we divide 5 by 815, we get 0 and a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 815

Let's proceed to step 2:
The number 815 fits into 51 0 times, leaving a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Include the next digit (1) from the dividend after 51, then repeat: 511 / 815

Moving on to step 3:
815 goes into 511 0 times with a remainder of 511.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 511 and we're left with 511.
Take the next digit (4) from the dividend and append it to 511, then repeat: 5114 / 815

Going ahead to step 4:
If we divide 5114 by 815, we get 6 and a remainder of 224.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Subtract 4890 from 5114 to get 224.
Bring next digit (9) of the dividend behind the 224 and repeat the process: 2249 / 815

Going ahead to step 5:
815 can be fit into 2249 2 times, resulting in a remainder of 619.
The number 2 becomes the next digit in our result. 
Result so far: 62.0
If we subtract 1630 from 2249, we get 619.
Fetch the next digit (2) from the dividend, attach it to 619 and continue: 6192 / 815

On to step 6:
When dividing 6192 by 815, we get 7 with a remainder of 487.
Write down 7 as next digit of the result. 
Result so far: 627.0
Subtract 5705 from 6192 to get 487.
Take the next digit (3) from the dividend and append it to 487, then repeat: 4873 / 815

Moving on to step 7:
If we divide 4873 by 815, we get 5 and a remainder of 798.
Write down 5 as next digit of the result. 
Result so far: 6275.0
If we take 4075 away from 4873, we end up with 798.
Append the next digit (1) from the dividend to 798 and continue with: 7981 / 815

Let's proceed to step 8:
815 goes into 7981 9 times with a remainder of 646.
The number 9 becomes the next digit in our result. 
Result so far: 62759.0
The remainder is 646 after subtracting 7335 from 7981.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6460, and continue the process.

Let's proceed to step 9:
815 goes into 6460 7 times with a remainder of 755.
Put 7 as the next digit of the answer. 
Result so far: 62759.7
If we take 5705 away from 6460, we end up with 755.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7550, and continue the process.

Step 10:
When dividing 7550 by 815, we get 9 with a remainder of 215.
Record the quotient 9 as the next digit in the result. 
Result so far: 62759.79
The remainder is 215 after subtracting 7335 from 7550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Let's proceed to step 11:
When dividing 2150 by 815, we get 2 with a remainder of 520.
Record the quotient 2 as the next digit in the result. 
Result so far: 62759.792
Subtracting 1630 from 2150 leaves us with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Going ahead to step 12:
815 goes into 5200 6 times with a remainder of 310.
Record the quotient 6 as the next digit in the result. 
Result so far: 62759.7926
If we subtract 4890 from 5200, we get 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Going ahead to step 13:
815 can be fit into 3100 3 times, resulting in a remainder of 655.
Use 3 as the next digit of our solution. 
Result so far: 62759.79263
If we take 2445 away from 3100, we end up with 655.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6550, and continue the process.

Let's proceed to step 14:
If we divide 6550 by 815, we get 8 and a remainder of 30.
Write down 8 as next digit of the result. 
Result so far: 62759.792638
If we subtract 6520 from 6550, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 15:
The number 815 fits into 300 0 times, leaving a remainder of 300.
The next digit of our result is 0. 
Result so far: 62759.792638
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 16:
3000 divided by 815 is 3 with a remainder of 555.
Record the quotient 3 as the next digit in the result. 
Result so far: 62759.79263803
Subtract 2445 from 3000 to get 555.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5550, and continue the process.

The quotient of the division is 62759.79263803, and the remainder is 5.55e-07.