We look at the division of 80607713 by 815 
The aim is to understand the frequency of 815 in 80607713.

Going ahead to step 1:
When dividing 8 by 815, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 815

Moving on to step 2:
815 goes into 80 0 times with a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 80, we end up with 80.
Append the next digit (6) from the dividend to 80 and continue with: 806 / 815

On to step 3:
806 divided by 815 is 0 with a remainder of 806.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 806 to get 806.
Take the next digit (0) from the dividend and append it to 806, then repeat: 8060 / 815

Let's proceed to step 4:
815 can be fit into 8060 9 times, resulting in a remainder of 725.
The next digit of our result is 9. 
Result so far: 9.0
The remainder is 725 after subtracting 7335 from 8060.
Append the next digit (7) from the dividend to 725 and continue with: 7257 / 815

Going ahead to step 5:
7257 divided by 815 is 8 with a remainder of 737.
Put 8 as the next digit of the answer. 
Result so far: 98.0
If we take 6520 away from 7257, we end up with 737.
Bring next digit (7) of the dividend behind the 737 and repeat the process: 7377 / 815

Let's proceed to step 6:
If we divide 7377 by 815, we get 9 and a remainder of 42.
Put 9 as the next digit of the answer. 
Result so far: 989.0
Subtracting 7335 from 7377 leaves us with 42.
Grab the next digit (1) from the dividend, add it to 42, then carry on: 421 / 815

On to step 7:
815 goes into 421 0 times with a remainder of 421.
Record the quotient 0 as the next digit in the result. 
Result so far: 9890.0
If we subtract 0 from 421, we get 421.
Include the next digit (3) from the dividend after 421, then repeat: 4213 / 815

Let's proceed to step 8:
When dividing 4213 by 815, we get 5 with a remainder of 138.
Put 5 as the next digit of the answer. 
Result so far: 98905.0
If we subtract 4075 from 4213, we get 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

Step 9:
815 goes into 1380 1 times with a remainder of 565.
Write down 1 as next digit of the result. 
Result so far: 98905.1
If we subtract 815 from 1380, we get 565.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5650, and continue the process.

Let's proceed to step 10:
815 can be fit into 5650 6 times, resulting in a remainder of 760.
The next digit of our result is 6. 
Result so far: 98905.16
The remainder is 760 after subtracting 4890 from 5650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7600, and continue the process.

Step 11:
7600 divided by 815 is 9 with a remainder of 265.
Put 9 as the next digit of the answer. 
Result so far: 98905.169
Deduct 7335 from 7600 and we're left with 265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

Advancing to step 12:
When dividing 2650 by 815, we get 3 with a remainder of 205.
The next digit of our result is 3. 
Result so far: 98905.1693
Subtracting 2445 from 2650 leaves us with 205.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

On to step 13:
815 can be fit into 2050 2 times, resulting in a remainder of 420.
Write down 2 as next digit of the result. 
Result so far: 98905.16932
If we subtract 1630 from 2050, we get 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

On to step 14:
If we divide 4200 by 815, we get 5 and a remainder of 125.
The number 5 becomes the next digit in our result. 
Result so far: 98905.169325
Subtracting 4075 from 4200 leaves us 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.

Moving on to step 15:
815 can be fit into 1250 1 times, resulting in a remainder of 435.
Write down 1 as next digit of the result. 
Result so far: 98905.1693251
Deduct 815 from 1250 and we're left with 435.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4350, and continue the process.

Step 16:
815 can be fit into 4350 5 times, resulting in a remainder of 275.
Record the quotient 5 as the next digit in the result. 
Result so far: 98905.16932515
If we take 4075 away from 4350, we end up with 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

In conclusion, the division gives 98905.16932515 with a balance of 2.75e-07.