We look at the division of 75050295 by 129 
The aim is to understand the frequency of 129 in 75050295.

Advancing to step 1:
When dividing 7 by 129, we get 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (5) from the dividend after 7, then repeat: 75 / 129

Step 2:
129 can be fit into 75 0 times, resulting in a remainder of 75.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 75 leaves us with 75.
Grab the next digit (0) from the dividend, add it to 75, then carry on: 750 / 129

Let's proceed to step 3:
750 divided by 129 is 5 with a remainder of 105.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Subtracting 645 from 750 leaves us with 105.
Include the next digit (5) from the dividend after 105, then repeat: 1055 / 129

Going ahead to step 4:
The number 129 fits into 1055 8 times, leaving a remainder of 23.
The next digit of our result is 8. 
Result so far: 58.0
If we take 1032 away from 1055, we end up with 23.
Take the next digit (0) from the dividend and append it to 23, then repeat: 230 / 129

Step 5:
129 goes into 230 1 times with a remainder of 101.
Put 1 as the next digit of the answer. 
Result so far: 581.0
The remainder is 101 after subtracting 129 from 230.
Bring next digit (2) of the dividend behind the 101 and repeat the process: 1012 / 129

Step 6:
129 goes into 1012 7 times with a remainder of 109.
Put 7 as the next digit of the answer. 
Result so far: 5817.0
Subtracting 903 from 1012 leaves us with 109.
Grab the next digit (9) from the dividend, add it to 109, then carry on: 1099 / 129

Step 7:
129 can be fit into 1099 8 times, resulting in a remainder of 67.
Write down 8 as next digit of the result. 
Result so far: 58178.0
If we take 1032 away from 1099, we end up with 67.
Include the next digit (5) from the dividend after 67, then repeat: 675 / 129

On to step 8:
The number 129 fits into 675 5 times, leaving a remainder of 30.
The next digit of our result is 5. 
Result so far: 581785.0
Subtracting 645 from 675 leaves us 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.

Going ahead to step 9:
300 divided by 129 is 2 with a remainder of 42.
Use 2 as the next digit of our solution. 
Result so far: 581785.2
Subtract 258 from 300 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 10:
129 can be fit into 420 3 times, resulting in a remainder of 33.
Write down 3 as next digit of the result. 
Result so far: 581785.23
Subtracting 387 from 420 leaves us with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

On to step 11:
The number 129 fits into 330 2 times, leaving a remainder of 72.
Put 2 as the next digit of the answer. 
Result so far: 581785.232
If we subtract 258 from 330, we get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Step 12:
The number 129 fits into 720 5 times, leaving a remainder of 75.
The next digit of our result is 5. 
Result so far: 581785.2325
If we subtract 645 from 720, we get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Step 13:
129 can be fit into 750 5 times, resulting in a remainder of 105.
The number 5 becomes the next digit in our result. 
Result so far: 581785.23255
Deduct 645 from 750 and we're left with 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

The final result is 581785.23255 with a remainder of 0.000105.