Let's divide 80711121 by 129
The aim is to understand the frequency of 129 in 80711121.

Advancing to step 1:
The number 129 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 129

Let's proceed to step 2:
When dividing 80 by 129, we get 0 with a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 80 leaves us with 80.
Append the next digit (7) from the dividend to 80 and continue with: 807 / 129

Step 3:
The number 129 fits into 807 6 times, leaving a remainder of 33.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Subtract 774 from 807 to get 33.
Take the next digit (1) from the dividend and append it to 33, then repeat: 331 / 129

Let's proceed to step 4:
When dividing 331 by 129, we get 2 with a remainder of 73.
Write down 2 as next digit of the result. 
Result so far: 62.0
Subtract 258 from 331 to get 73.
Grab the next digit (1) from the dividend, add it to 73, then carry on: 731 / 129

Step 5:
731 divided by 129 is 5 with a remainder of 86.
Use 5 as the next digit of our solution. 
Result so far: 625.0
If we take 645 away from 731, we end up with 86.
Include the next digit (1) from the dividend after 86, then repeat: 861 / 129

Step 6:
If we divide 861 by 129, we get 6 and a remainder of 87.
The number 6 becomes the next digit in our result. 
Result so far: 6256.0
Subtract 774 from 861 to get 87.
Take the next digit (2) from the dividend and append it to 87, then repeat: 872 / 129

On to step 7:
872 divided by 129 is 6 with a remainder of 98.
Use 6 as the next digit of our solution. 
Result so far: 62566.0
The remainder is 98 after subtracting 774 from 872.
Bring next digit (1) of the dividend behind the 98 and repeat the process: 981 / 129

Advancing to step 8:
When dividing 981 by 129, we get 7 with a remainder of 78.
Put 7 as the next digit of the answer. 
Result so far: 625667.0
If we take 903 away from 981, we end up with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Step 9:
780 divided by 129 is 6 with a remainder of 6.
Put 6 as the next digit of the answer. 
Result so far: 625667.6
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.

On to step 10:
If we divide 60 by 129, we get 0 and a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 625667.6
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 11:
129 goes into 600 4 times with a remainder of 84.
Use 4 as the next digit of our solution. 
Result so far: 625667.604
Subtracting 516 from 600 leaves us with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Moving on to step 12:
When dividing 840 by 129, we get 6 with a remainder of 66.
Use 6 as the next digit of our solution. 
Result so far: 625667.6046
If we take 774 away from 840, we end up 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.

Let's proceed to step 13:
When dividing 660 by 129, we get 5 with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 625667.60465
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.

On to step 14:
If we divide 150 by 129, we get 1 and a remainder of 21.
Write down 1 as next digit of the result. 
Result so far: 625667.604651
The remainder is 21 after subtracting 129 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 15:
When dividing 210 by 129, we get 1 with a remainder of 81.
The number 1 becomes the next digit in our result. 
Result so far: 625667.6046511
Subtract 129 from 210 to get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

The quotient of the division is 625667.6046511, and the remainder is 8.1e-07.