88640702 ÷ 815 
The aim is to understand the frequency of 815 in 88640702.

Let's proceed to step 1:
When dividing 8 by 815, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (8) from the dividend after 8, then repeat: 88 / 815

On to step 2:
815 goes into 88 0 times with a remainder of 88.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 88, we end up with 88.
Take the next digit (6) from the dividend and append it to 88, then repeat: 886 / 815

Advancing to step 3:
815 goes into 886 1 times with a remainder of 71.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 815 from 886 leaves us with 71.
Append the next digit (4) from the dividend to 71 and continue with: 714 / 815

On to step 4:
When dividing 714 by 815, we get 0 with a remainder of 714.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Subtracting 0 from 714 leaves us with 714.
Append the next digit (0) from the dividend to 714 and continue with: 7140 / 815

Advancing to step 5:
If we divide 7140 by 815, we get 8 and a remainder of 620.
Put 8 as the next digit of the answer. 
Result so far: 108.0
Subtract 6520 from 7140 to get 620.
Fetch the next digit (7) from the dividend, attach it to 620 and continue: 6207 / 815

Moving on to step 6:
If we divide 6207 by 815, we get 7 and a remainder of 502.
Put 7 as the next digit of the answer. 
Result so far: 1087.0
Deduct 5705 from 6207 and we're left with 502.
Grab the next digit (0) from the dividend, add it to 502, then carry on: 5020 / 815

Moving on to step 7:
815 goes into 5020 6 times with a remainder of 130.
The next digit of our result is 6. 
Result so far: 10876.0
The remainder is 130 after subtracting 4890 from 5020.
Append the next digit (2) from the dividend to 130 and continue with: 1302 / 815

On to step 8:
The number 815 fits into 1302 1 times, leaving a remainder of 487.
Use 1 as the next digit of our solution. 
Result so far: 108761.0
If we subtract 815 from 1302, we get 487.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4870, and continue the process.

Let's proceed to step 9:
If we divide 4870 by 815, we get 5 and a remainder of 795.
The number 5 becomes the next digit in our result. 
Result so far: 108761.5
If we subtract 4075 from 4870, we get 795.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7950, and continue the process.

Moving on to step 10:
The number 815 fits into 7950 9 times, leaving a remainder of 615.
Put 9 as the next digit of the answer. 
Result so far: 108761.59
The remainder is 615 after subtracting 7335 from 7950.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6150, and continue the process.

Step 11:
815 can be fit into 6150 7 times, resulting in a remainder of 445.
Use 7 as the next digit of our solution. 
Result so far: 108761.597
The remainder is 445 after subtracting 5705 from 6150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4450, and continue the process.

On to step 12:
The number 815 fits into 4450 5 times, leaving a remainder of 375.
Put 5 as the next digit of the answer. 
Result so far: 108761.5975
Subtracting 4075 from 4450 leaves us with 375.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3750, and continue the process.

Step 13:
When dividing 3750 by 815, we get 4 with a remainder of 490.
Use 4 as the next digit of our solution. 
Result so far: 108761.59754
If we take 3260 away from 3750, we end up with 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4900, and continue the process.

On to step 14:
815 goes into 4900 6 times with a remainder of 10.
Put 6 as the next digit of the answer. 
Result so far: 108761.597546
If we take 4890 away from 4900, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 15:
The number 815 fits into 100 0 times, leaving a remainder of 100.
Write down 0 as next digit of the result. 
Result so far: 108761.597546
If we take 0 away from 100, we end up with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Step 16:
If we divide 1000 by 815, we get 1 and a remainder of 185.
Record the quotient 1 as the next digit in the result. 
Result so far: 108761.59754601
If we take 815 away from 1000, we end up with 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

The quotient of the division is 108761.59754601, and the remainder is 1.85e-07.