30757025 divided by 129 
The aim is to understand the frequency of 129 in 30757025.

Advancing to step 1:
3 divided by 129 is 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 129

Step 2:
The number 129 fits into 30 0 times, leaving a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 30 and we're left with 30.
Append the next digit (7) from the dividend to 30 and continue with: 307 / 129

Advancing to step 3:
307 divided by 129 is 2 with a remainder of 49.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 258 from 307, we get 49.
Include the next digit (5) from the dividend after 49, then repeat: 495 / 129

Step 4:
When dividing 495 by 129, we get 3 with a remainder of 108.
The next digit of our result is 3. 
Result so far: 23.0
The remainder is 108 after subtracting 387 from 495.
Grab the next digit (7) from the dividend, add it to 108, then carry on: 1087 / 129

On to step 5:
When dividing 1087 by 129, we get 8 with a remainder of 55.
Put 8 as the next digit of the answer. 
Result so far: 238.0
The remainder is 55 after subtracting 1032 from 1087.
Include the next digit (0) from the dividend after 55, then repeat: 550 / 129

Moving on to step 6:
129 goes into 550 4 times with a remainder of 34.
Use 4 as the next digit of our solution. 
Result so far: 2384.0
If we take 516 away from 550, we end up with 34.
Bring next digit (2) of the dividend behind the 34 and repeat the process: 342 / 129

Advancing to step 7:
342 divided by 129 is 2 with a remainder of 84.
Write down 2 as next digit of the result. 
Result so far: 23842.0
The remainder is 84 after subtracting 258 from 342.
Grab the next digit (5) from the dividend, add it to 84, then carry on: 845 / 129

On to step 8:
If we divide 845 by 129, we get 6 and a remainder of 71.
Use 6 as the next digit of our solution. 
Result so far: 238426.0
Subtract 774 from 845 to get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Let's proceed to step 9:
The number 129 fits into 710 5 times, leaving a remainder of 65.
Put 5 as the next digit of the answer. 
Result so far: 238426.5
If we take 645 away from 710, we end up with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Step 10:
When dividing 650 by 129, we get 5 with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 238426.55
Subtract 645 from 650 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final result is 238426.55 with a remainder of 0.005.