51564247 ÷ 815 
The aim is to understand the frequency of 815 in 51564247.

Step 1:
If we divide 5 by 815, we get 0 and a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 815

Let's proceed to step 2:
The number 815 fits into 51 0 times, leaving a remainder of 51.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 51, we end up with 51.
Take the next digit (5) from the dividend and append it to 51, then repeat: 515 / 815

Advancing to step 3:
815 can be fit into 515 0 times, resulting in a remainder of 515.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 515, we get 515.
Grab the next digit (6) from the dividend, add it to 515, then carry on: 5156 / 815

Let's proceed to step 4:
815 goes into 5156 6 times with a remainder of 266.
Put 6 as the next digit of the answer. 
Result so far: 6.0
The remainder is 266 after subtracting 4890 from 5156.
Fetch the next digit (4) from the dividend, attach it to 266 and continue: 2664 / 815

On to step 5:
When dividing 2664 by 815, we get 3 with a remainder of 219.
Put 3 as the next digit of the answer. 
Result so far: 63.0
The remainder is 219 after subtracting 2445 from 2664.
Bring next digit (2) of the dividend behind the 219 and repeat the process: 2192 / 815

Let's proceed to step 6:
The number 815 fits into 2192 2 times, leaving a remainder of 562.
The next digit of our result is 2. 
Result so far: 632.0
Subtracting 1630 from 2192 leaves us with 562.
Append the next digit (4) from the dividend to 562 and continue with: 5624 / 815

Going ahead to step 7:
815 goes into 5624 6 times with a remainder of 734.
Use 6 as the next digit of our solution. 
Result so far: 6326.0
Subtract 4890 from 5624 to get 734.
Take the next digit (7) from the dividend and append it to 734, then repeat: 7347 / 815

Let's proceed to step 8:
The number 815 fits into 7347 9 times, leaving a remainder of 12.
The next digit of our result is 9. 
Result so far: 63269.0
If we subtract 7335 from 7347, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 9:
815 goes into 120 0 times with a remainder of 120.
Record the quotient 0 as the next digit in the result. 
Result so far: 63269.0
If we take 0 away from 120, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

On to step 10:
815 goes into 1200 1 times with a remainder of 385.
Write down 1 as next digit of the result. 
Result so far: 63269.01
Subtracting 815 from 1200 leaves us with 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

Advancing to step 11:
815 goes into 3850 4 times with a remainder of 590.
The number 4 becomes the next digit in our result. 
Result so far: 63269.014
If we subtract 3260 from 3850, we get 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

Step 12:
The number 815 fits into 5900 7 times, leaving a remainder of 195.
The number 7 becomes the next digit in our result. 
Result so far: 63269.0147
The remainder is 195 after subtracting 5705 from 5900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Moving on to step 13:
815 goes into 1950 2 times with a remainder of 320.
Write down 2 as next digit of the result. 
Result so far: 63269.01472
Deduct 1630 from 1950 and we're left with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

On to step 14:
When dividing 3200 by 815, we get 3 with a remainder of 755.
The number 3 becomes the next digit in our result. 
Result so far: 63269.014723
If we subtract 2445 from 3200, we get 755.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7550, and continue the process.

Let's proceed to step 15:
815 can be fit into 7550 9 times, resulting in a remainder of 215.
The number 9 becomes the next digit in our result. 
Result so far: 63269.0147239
Subtracting 7335 from 7550 leaves us with 215.
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 16:
2150 divided by 815 is 2 with a remainder of 520.
The number 2 becomes the next digit in our result. 
Result so far: 63269.01472392
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.

The quotient of the division is 63269.01472392, and the remainder is 5.2e-07.