We look at the division of 89452710 by 815 
The aim is to understand the frequency of 815 in 89452710.

Step 1:
The number 815 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (9) from the dividend to 8 and continue with: 89 / 815

Going ahead to step 2:
When dividing 89 by 815, we get 0 with a remainder of 89.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 89, we end up with 89.
Take the next digit (4) from the dividend and append it to 89, then repeat: 894 / 815

Let's proceed to step 3:
815 can be fit into 894 1 times, resulting in a remainder of 79.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 815 from 894 and we're left with 79.
Include the next digit (5) from the dividend after 79, then repeat: 795 / 815

Let's proceed to step 4:
When dividing 795 by 815, we get 0 with a remainder of 795.
Use 0 as the next digit of our solution. 
Result so far: 10.0
Deduct 0 from 795 and we're left with 795.
Include the next digit (2) from the dividend after 795, then repeat: 7952 / 815

On to step 5:
If we divide 7952 by 815, we get 9 and a remainder of 617.
The next digit of our result is 9. 
Result so far: 109.0
Subtract 7335 from 7952 to get 617.
Grab the next digit (7) from the dividend, add it to 617, then carry on: 6177 / 815

Advancing to step 6:
When dividing 6177 by 815, we get 7 with a remainder of 472.
Use 7 as the next digit of our solution. 
Result so far: 1097.0
Deduct 5705 from 6177 and we're left with 472.
Append the next digit (1) from the dividend to 472 and continue with: 4721 / 815

On to step 7:
When dividing 4721 by 815, we get 5 with a remainder of 646.
Record the quotient 5 as the next digit in the result. 
Result so far: 10975.0
If we take 4075 away from 4721, we end up with 646.
Fetch the next digit (0) from the dividend, attach it to 646 and continue: 6460 / 815

Advancing to step 8:
If we divide 6460 by 815, we get 7 and a remainder of 755.
Write down 7 as next digit of the result. 
Result so far: 109757.0
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.

Moving on to step 9:
If we divide 7550 by 815, we get 9 and a remainder of 215.
Record the quotient 9 as the next digit in the result. 
Result so far: 109757.9
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.

Going ahead to step 10:
When dividing 2150 by 815, we get 2 with a remainder of 520.
Use 2 as the next digit of our solution. 
Result so far: 109757.92
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.

Advancing to step 11:
815 goes into 5200 6 times with a remainder of 310.
The number 6 becomes the next digit in our result. 
Result so far: 109757.926
The remainder is 310 after subtracting 4890 from 5200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

On to step 12:
815 can be fit into 3100 3 times, resulting in a remainder of 655.
Put 3 as the next digit of the answer. 
Result so far: 109757.9263
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.

On to step 13:
6550 divided by 815 is 8 with a remainder of 30.
Record the quotient 8 as the next digit in the result. 
Result so far: 109757.92638
If we take 6520 away from 6550, 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 14:
300 divided by 815 is 0 with a remainder of 300.
Record the quotient 0 as the next digit in the result. 
Result so far: 109757.92638
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.

Going ahead to step 15:
If we divide 3000 by 815, we get 3 and a remainder of 555.
The next digit of our result is 3. 
Result so far: 109757.9263803
If we subtract 2445 from 3000, we 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.

Moving on to step 16:
815 can be fit into 5550 6 times, resulting in a remainder of 660.
The number 6 becomes the next digit in our result. 
Result so far: 109757.92638036
The remainder is 660 after subtracting 4890 from 5550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6600, and continue the process.

The final outcome is 109757.92638036, with a leftover of 6.6e-07.