Let's divide 448751 by 129
The aim is to understand the frequency of 129 in 448751.

Moving on to step 1:
4 divided by 129 is 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Append the next digit (4) from the dividend to 4 and continue with: 44 / 129

Going ahead to step 2:
129 can be fit into 44 0 times, resulting in a remainder of 44.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 44 to get 44.
Include the next digit (8) from the dividend after 44, then repeat: 448 / 129

On to step 3:
448 divided by 129 is 3 with a remainder of 61.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
The remainder is 61 after subtracting 387 from 448.
Fetch the next digit (7) from the dividend, attach it to 61 and continue: 617 / 129

Step 4:
617 divided by 129 is 4 with a remainder of 101.
Use 4 as the next digit of our solution. 
Result so far: 34.0
Subtracting 516 from 617 leaves us with 101.
Grab the next digit (5) from the dividend, add it to 101, then carry on: 1015 / 129

Moving on to step 5:
If we divide 1015 by 129, we get 7 and a remainder of 112.
Write down 7 as next digit of the result. 
Result so far: 347.0
The remainder is 112 after subtracting 903 from 1015.
Bring next digit (1) of the dividend behind the 112 and repeat the process: 1121 / 129

Let's proceed to step 6:
129 goes into 1121 8 times with a remainder of 89.
Put 8 as the next digit of the answer. 
Result so far: 3478.0
If we take 1032 away from 1121, we end up with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Going ahead to step 7:
When dividing 890 by 129, we get 6 with a remainder of 116.
Use 6 as the next digit of our solution. 
Result so far: 3478.6
The remainder is 116 after subtracting 774 from 890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

On to step 8:
1160 divided by 129 is 8 with a remainder of 128.
Use 8 as the next digit of our solution. 
Result so far: 3478.68
If we subtract 1032 from 1160, we get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Advancing to step 9:
1280 divided by 129 is 9 with a remainder of 119.
The number 9 becomes the next digit in our result. 
Result so far: 3478.689
If we subtract 1161 from 1280, we get 119.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1190, and continue the process.

Going ahead to step 10:
129 goes into 1190 9 times with a remainder of 29.
The next digit of our result is 9. 
Result so far: 3478.6899
The remainder is 29 after subtracting 1161 from 1190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Our division results in 3478.6899 with a remaining 0.00029.