We look at the division of 19827036 by 129 
The aim is to understand the frequency of 129 in 19827036.

On to step 1:
129 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 129

On to step 2:
When dividing 19 by 129, we get 0 with a remainder of 19.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 19 after subtracting 0 from 19.
Take the next digit (8) from the dividend and append it to 19, then repeat: 198 / 129

Going ahead to step 3:
When dividing 198 by 129, we get 1 with a remainder of 69.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 129 from 198 and we're left with 69.
Include the next digit (2) from the dividend after 69, then repeat: 692 / 129

Step 4:
When dividing 692 by 129, we get 5 with a remainder of 47.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Subtracting 645 from 692 leaves us with 47.
Append the next digit (7) from the dividend to 47 and continue with: 477 / 129

Moving on to step 5:
477 divided by 129 is 3 with a remainder of 90.
Write down 3 as next digit of the result. 
Result so far: 153.0
If we take 387 away from 477, we end up with 90.
Bring next digit (0) of the dividend behind the 90 and repeat the process: 900 / 129

Step 6:
129 can be fit into 900 6 times, resulting in a remainder of 126.
Put 6 as the next digit of the answer. 
Result so far: 1536.0
Deduct 774 from 900 and we're left with 126.
Bring next digit (3) of the dividend behind the 126 and repeat the process: 1263 / 129

Advancing to step 7:
129 can be fit into 1263 9 times, resulting in a remainder of 102.
Use 9 as the next digit of our solution. 
Result so far: 15369.0
If we subtract 1161 from 1263, we get 102.
Grab the next digit (6) from the dividend, add it to 102, then carry on: 1026 / 129

Let's proceed to step 8:
The number 129 fits into 1026 7 times, leaving a remainder of 123.
Put 7 as the next digit of the answer. 
Result so far: 153697.0
If we take 903 away from 1026, we end up with 123.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1230, and continue the process.

On to step 9:
When dividing 1230 by 129, we get 9 with a remainder of 69.
Put 9 as the next digit of the answer. 
Result so far: 153697.9
If we take 1161 away from 1230, we end up with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Advancing to step 10:
129 can be fit into 690 5 times, resulting in a remainder of 45.
Write down 5 as next digit of the result. 
Result so far: 153697.95
Subtracting 645 from 690 leaves us with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Moving on to step 11:
129 can be fit into 450 3 times, resulting in a remainder of 63.
Put 3 as the next digit of the answer. 
Result so far: 153697.953
If we subtract 387 from 450, we get 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Step 12:
129 can be fit into 630 4 times, resulting in a remainder of 114.
The number 4 becomes the next digit in our result. 
Result so far: 153697.9534
Deduct 516 from 630 and we're left with 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

Step 13:
1140 divided by 129 is 8 with a remainder of 108.
The next digit of our result is 8. 
Result so far: 153697.95348
If we take 1032 away from 1140, we end up with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Step 14:
The number 129 fits into 1080 8 times, leaving a remainder of 48.
Put 8 as the next digit of the answer. 
Result so far: 153697.953488
The remainder is 48 after subtracting 1032 from 1080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Our division results in 153697.953488 with a remaining 4.8e-06.