We're dividing 49235161 by 129 
The aim is to understand the frequency of 129 in 49235161.

Going ahead to step 1:
The number 129 fits into 4 0 times, leaving a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (9) from the dividend and append it to 4, then repeat: 49 / 129

Moving on to step 2:
The number 129 fits into 49 0 times, leaving a remainder of 49.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 49, we end up with 49.
Grab the next digit (2) from the dividend, add it to 49, then carry on: 492 / 129

On to step 3:
492 divided by 129 is 3 with a remainder of 105.
The next digit of our result is 3. 
Result so far: 3.0
The remainder is 105 after subtracting 387 from 492.
Append the next digit (3) from the dividend to 105 and continue with: 1053 / 129

Step 4:
If we divide 1053 by 129, we get 8 and a remainder of 21.
The next digit of our result is 8. 
Result so far: 38.0
Deduct 1032 from 1053 and we're left with 21.
Grab the next digit (5) from the dividend, add it to 21, then carry on: 215 / 129

Going ahead to step 5:
If we divide 215 by 129, we get 1 and a remainder of 86.
The next digit of our result is 1. 
Result so far: 381.0
Subtract 129 from 215 to get 86.
Fetch the next digit (1) from the dividend, attach it to 86 and continue: 861 / 129

Advancing to step 6:
861 divided by 129 is 6 with a remainder of 87.
Use 6 as the next digit of our solution. 
Result so far: 3816.0
Deduct 774 from 861 and we're left with 87.
Take the next digit (6) from the dividend and append it to 87, then repeat: 876 / 129

On to step 7:
129 can be fit into 876 6 times, resulting in a remainder of 102.
Record the quotient 6 as the next digit in the result. 
Result so far: 38166.0
If we take 774 away from 876, we end up with 102.
Bring next digit (1) of the dividend behind the 102 and repeat the process: 1021 / 129

Advancing to step 8:
If we divide 1021 by 129, we get 7 and a remainder of 118.
The number 7 becomes the next digit in our result. 
Result so far: 381667.0
If we take 903 away from 1021, we end up with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Advancing to step 9:
The number 129 fits into 1180 9 times, leaving a remainder of 19.
Write down 9 as next digit of the result. 
Result so far: 381667.9
The remainder is 19 after subtracting 1161 from 1180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 10:
129 goes into 190 1 times with a remainder of 61.
The next digit of our result is 1. 
Result so far: 381667.91
If we subtract 129 from 190, we get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Let's proceed to step 11:
The number 129 fits into 610 4 times, leaving a remainder of 94.
Record the quotient 4 as the next digit in the result. 
Result so far: 381667.914
Deduct 516 from 610 and we're left with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Step 12:
129 can be fit into 940 7 times, resulting in a remainder of 37.
The next digit of our result is 7. 
Result so far: 381667.9147
Deduct 903 from 940 and we're left with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 13:
The number 129 fits into 370 2 times, leaving a remainder of 112.
Record the quotient 2 as the next digit in the result. 
Result so far: 381667.91472
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.

Going ahead to step 14:
129 can be fit into 1120 8 times, resulting in a remainder of 88.
The number 8 becomes the next digit in our result. 
Result so far: 381667.914728
Subtracting 1032 from 1120 leaves us with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Advancing to step 15:
The number 129 fits into 880 6 times, leaving a remainder of 106.
Record the quotient 6 as the next digit in the result. 
Result so far: 381667.9147286
If we take 774 away from 880, we end up 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 16:
129 can be fit into 1060 8 times, resulting in a remainder of 28.
The number 8 becomes the next digit in our result. 
Result so far: 381667.91472868
Deduct 1032 from 1060 and we're left 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.

Our division results in 381667.91472868 with a remaining 2.8e-08.