99458320 divided by 129 
The aim is to understand the frequency of 129 in 99458320.

Step 1:
The number 129 fits into 9 0 times, leaving a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Append the next digit (9) from the dividend to 9 and continue with: 99 / 129

On to step 2:
99 divided by 129 is 0 with a remainder of 99.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 99 leaves us with 99.
Take the next digit (4) from the dividend and append it to 99, then repeat: 994 / 129

Going ahead to step 3:
129 goes into 994 7 times with a remainder of 91.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we subtract 903 from 994, we get 91.
Fetch the next digit (5) from the dividend, attach it to 91 and continue: 915 / 129

Going ahead to step 4:
915 divided by 129 is 7 with a remainder of 12.
Put 7 as the next digit of the answer. 
Result so far: 77.0
Subtract 903 from 915 to get 12.
Fetch the next digit (8) from the dividend, attach it to 12 and continue: 128 / 129

Advancing to step 5:
If we divide 128 by 129, we get 0 and a remainder of 128.
The number 0 becomes the next digit in our result. 
Result so far: 770.0
Subtracting 0 from 128 leaves us with 128.
Include the next digit (3) from the dividend after 128, then repeat: 1283 / 129

Advancing to step 6:
129 goes into 1283 9 times with a remainder of 122.
Use 9 as the next digit of our solution. 
Result so far: 7709.0
Deduct 1161 from 1283 and we're left with 122.
Take the next digit (2) from the dividend and append it to 122, then repeat: 1222 / 129

Going ahead to step 7:
If we divide 1222 by 129, we get 9 and a remainder of 61.
Put 9 as the next digit of the answer. 
Result so far: 77099.0
Deduct 1161 from 1222 and we're left with 61.
Include the next digit (0) from the dividend after 61, then repeat: 610 / 129

Advancing to step 8:
When dividing 610 by 129, we get 4 with a remainder of 94.
Use 4 as the next digit of our solution. 
Result so far: 770994.0
The remainder is 94 after subtracting 516 from 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Step 9:
The number 129 fits into 940 7 times, leaving a remainder of 37.
The number 7 becomes the next digit in our result. 
Result so far: 770994.7
The remainder is 37 after subtracting 903 from 940.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Let's proceed to step 10:
129 goes into 370 2 times with a remainder of 112.
The next digit of our result is 2. 
Result so far: 770994.72
If we take 258 away from 370, we end up with 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Moving on to step 11:
When dividing 1120 by 129, we get 8 with a remainder of 88.
Record the quotient 8 as the next digit in the result. 
Result so far: 770994.728
The remainder is 88 after subtracting 1032 from 1120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

On to step 12:
If we divide 880 by 129, we get 6 and a remainder of 106.
The number 6 becomes the next digit in our result. 
Result so far: 770994.7286
Deduct 774 from 880 and we're left with 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

Let's proceed to step 13:
1060 divided by 129 is 8 with a remainder of 28.
The number 8 becomes the next digit in our result. 
Result so far: 770994.72868
If we take 1032 away from 1060, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 14:
129 can be fit into 280 2 times, resulting in a remainder of 22.
The next digit of our result is 2. 
Result so far: 770994.728682
Deduct 258 from 280 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 15:
220 divided by 129 is 1 with a remainder of 91.
Put 1 as the next digit of the answer. 
Result so far: 770994.7286821
Subtracting 129 from 220 leaves us with 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Let's proceed to step 16:
129 goes into 910 7 times with a remainder of 7.
Write down 7 as next digit of the result. 
Result so far: 770994.72868217
If we take 903 away from 910, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Our division results in 770994.72868217 with a remaining 7e-09.