We look at the division of 81507617 by 929 
The aim is to understand the frequency of 929 in 81507617.

On to step 1:
If we divide 8 by 929, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 929

Going ahead to step 2:
929 goes into 81 0 times with a remainder of 81.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Append the next digit (5) from the dividend to 81 and continue with: 815 / 929

On to step 3:
When dividing 815 by 929, we get 0 with a remainder of 815.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 815 after subtracting 0 from 815.
Include the next digit (0) from the dividend after 815, then repeat: 8150 / 929

Advancing to step 4:
929 goes into 8150 8 times with a remainder of 718.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
If we subtract 7432 from 8150, we get 718.
Take the next digit (7) from the dividend and append it to 718, then repeat: 7187 / 929

On to step 5:
If we divide 7187 by 929, we get 7 and a remainder of 684.
The next digit of our result is 7. 
Result so far: 87.0
Subtracting 6503 from 7187 leaves us with 684.
Include the next digit (6) from the dividend after 684, then repeat: 6846 / 929

On to step 6:
929 can be fit into 6846 7 times, resulting in a remainder of 343.
The next digit of our result is 7. 
Result so far: 877.0
If we take 6503 away from 6846, we end up with 343.
Grab the next digit (1) from the dividend, add it to 343, then carry on: 3431 / 929

On to step 7:
When dividing 3431 by 929, we get 3 with a remainder of 644.
The next digit of our result is 3. 
Result so far: 8773.0
If we subtract 2787 from 3431, we get 644.
Take the next digit (7) from the dividend and append it to 644, then repeat: 6447 / 929

Let's proceed to step 8:
929 can be fit into 6447 6 times, resulting in a remainder of 873.
Put 6 as the next digit of the answer. 
Result so far: 87736.0
If we subtract 5574 from 6447, we get 873.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8730, and continue the process.

Advancing to step 9:
8730 divided by 929 is 9 with a remainder of 369.
Record the quotient 9 as the next digit in the result. 
Result so far: 87736.9
If we take 8361 away from 8730, we end up with 369.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3690, and continue the process.

Going ahead to step 10:
The number 929 fits into 3690 3 times, leaving a remainder of 903.
Record the quotient 3 as the next digit in the result. 
Result so far: 87736.93
Subtract 2787 from 3690 to get 903.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9030, and continue the process.

Step 11:
If we divide 9030 by 929, we get 9 and a remainder of 669.
The number 9 becomes the next digit in our result. 
Result so far: 87736.939
If we subtract 8361 from 9030, we get 669.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6690, and continue the process.

Advancing to step 12:
6690 divided by 929 is 7 with a remainder of 187.
The number 7 becomes the next digit in our result. 
Result so far: 87736.9397
Deduct 6503 from 6690 and we're left with 187.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1870, and continue the process.

Going ahead to step 13:
929 goes into 1870 2 times with a remainder of 12.
Put 2 as the next digit of the answer. 
Result so far: 87736.93972
Subtracting 1858 from 1870 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 14:
929 goes into 120 0 times with a remainder of 120.
Write down 0 as next digit of the result. 
Result so far: 87736.93972
Subtracting 0 from 120 leaves us 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 15:
929 goes into 1200 1 times with a remainder of 271.
Write down 1 as next digit of the result. 
Result so far: 87736.9397201
Subtracting 929 from 1200 leaves us with 271.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2710, and continue the process.

Advancing to step 16:
2710 divided by 929 is 2 with a remainder of 852.
Put 2 as the next digit of the answer. 
Result so far: 87736.93972012
If we take 1858 away from 2710, we end up with 852.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8520, and continue the process.

After the division, we end up with 87736.93972012 and a remainder of 8.52e-07.