57261090 divided by 129 
The aim is to understand the frequency of 129 in 57261090.

Let's proceed to step 1:
129 can be fit into 5 0 times, resulting in a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (7) from the dividend, add it to 5, then carry on: 57 / 129

On to step 2:
The number 129 fits into 57 0 times, leaving a remainder of 57.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 57, we end up with 57.
Include the next digit (2) from the dividend after 57, then repeat: 572 / 129

On to step 3:
129 can be fit into 572 4 times, resulting in a remainder of 56.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we subtract 516 from 572, we get 56.
Grab the next digit (6) from the dividend, add it to 56, then carry on: 566 / 129

Going ahead to step 4:
129 goes into 566 4 times with a remainder of 50.
The number 4 becomes the next digit in our result. 
Result so far: 44.0
Subtracting 516 from 566 leaves us with 50.
Append the next digit (1) from the dividend to 50 and continue with: 501 / 129

Step 5:
If we divide 501 by 129, we get 3 and a remainder of 114.
The number 3 becomes the next digit in our result. 
Result so far: 443.0
Deduct 387 from 501 and we're left with 114.
Take the next digit (0) from the dividend and append it to 114, then repeat: 1140 / 129

Let's proceed to step 6:
129 can be fit into 1140 8 times, resulting in a remainder of 108.
The next digit of our result is 8. 
Result so far: 4438.0
If we take 1032 away from 1140, we end up with 108.
Grab the next digit (9) from the dividend, add it to 108, then carry on: 1089 / 129

On to step 7:
The number 129 fits into 1089 8 times, leaving a remainder of 57.
Put 8 as the next digit of the answer. 
Result so far: 44388.0
If we subtract 1032 from 1089, we get 57.
Grab the next digit (0) from the dividend, add it to 57, then carry on: 570 / 129

Going ahead to step 8:
129 goes into 570 4 times with a remainder of 54.
The number 4 becomes the next digit in our result. 
Result so far: 443884.0
Subtracting 516 from 570 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Step 9:
129 goes into 540 4 times with a remainder of 24.
The next digit of our result is 4. 
Result so far: 443884.4
The remainder is 24 after subtracting 516 from 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 10:
When dividing 240 by 129, we get 1 with a remainder of 111.
Use 1 as the next digit of our solution. 
Result so far: 443884.41
The remainder is 111 after subtracting 129 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

Step 11:
1110 divided by 129 is 8 with a remainder of 78.
The next digit of our result is 8. 
Result so far: 443884.418
If we subtract 1032 from 1110, we get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Going ahead to step 12:
The number 129 fits into 780 6 times, leaving a remainder of 6.
Use 6 as the next digit of our solution. 
Result so far: 443884.4186
Subtracting 774 from 780 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 13:
The number 129 fits into 60 0 times, leaving a remainder of 60.
The next digit of our result is 0. 
Result so far: 443884.4186
Deduct 0 from 60 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 14:
129 goes into 600 4 times with a remainder of 84.
The next digit of our result is 4. 
Result so far: 443884.418604
Subtract 516 from 600 to get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

On to step 15:
The number 129 fits into 840 6 times, leaving a remainder of 66.
The number 6 becomes the next digit in our result. 
Result so far: 443884.4186046
Subtracting 774 from 840 leaves us with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Going ahead to step 16:
660 divided by 129 is 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 443884.41860465
If we subtract 645 from 660, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Our division results in 443884.41860465 with a remaining 1.5e-08.