We divide 67216663 by 815
The aim is to understand the frequency of 815 in 67216663.

Let's proceed to step 1:
6 divided by 815 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (7) from the dividend, add it to 6, then carry on: 67 / 815

Moving on to step 2:
67 divided by 815 is 0 with a remainder of 67.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 67 and we're left with 67.
Include the next digit (2) from the dividend after 67, then repeat: 672 / 815

Step 3:
815 can be fit into 672 0 times, resulting in a remainder of 672.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 672 after subtracting 0 from 672.
Include the next digit (1) from the dividend after 672, then repeat: 6721 / 815

Going ahead to step 4:
6721 divided by 815 is 8 with a remainder of 201.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Subtract 6520 from 6721 to get 201.
Include the next digit (6) from the dividend after 201, then repeat: 2016 / 815

Step 5:
815 goes into 2016 2 times with a remainder of 386.
The number 2 becomes the next digit in our result. 
Result so far: 82.0
The remainder is 386 after subtracting 1630 from 2016.
Bring next digit (6) of the dividend behind the 386 and repeat the process: 3866 / 815

On to step 6:
The number 815 fits into 3866 4 times, leaving a remainder of 606.
The number 4 becomes the next digit in our result. 
Result so far: 824.0
If we take 3260 away from 3866, we end up with 606.
Append the next digit (6) from the dividend to 606 and continue with: 6066 / 815

Advancing to step 7:
815 can be fit into 6066 7 times, resulting in a remainder of 361.
Write down 7 as next digit of the result. 
Result so far: 8247.0
Deduct 5705 from 6066 and we're left with 361.
Take the next digit (3) from the dividend and append it to 361, then repeat: 3613 / 815

Going ahead to step 8:
815 goes into 3613 4 times with a remainder of 353.
Write down 4 as next digit of the result. 
Result so far: 82474.0
If we subtract 3260 from 3613, we get 353.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3530, and continue the process.

Let's proceed to step 9:
3530 divided by 815 is 4 with a remainder of 270.
Record the quotient 4 as the next digit in the result. 
Result so far: 82474.4
If we take 3260 away from 3530, we end up 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.

Step 10:
2700 divided by 815 is 3 with a remainder of 255.
The next digit of our result is 3. 
Result so far: 82474.43
The remainder is 255 after subtracting 2445 from 2700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

Going ahead to step 11:
If we divide 2550 by 815, we get 3 and a remainder of 105.
Record the quotient 3 as the next digit in the result. 
Result so far: 82474.433
If we take 2445 away from 2550, we end up with 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

After the division, we end up with 82474.433 and a remainder of 0.0105.