We're dividing 309632 by 872 
The aim is to understand the frequency of 872 in 309632.

On to step 1:
3 divided by 872 is 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Include the next digit (0) from the dividend after 3, then repeat: 30 / 872

Let's proceed to step 2:
872 goes into 30 0 times with a remainder of 30.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 30 after subtracting 0 from 30.
Append the next digit (9) from the dividend to 30 and continue with: 309 / 872

Going ahead to step 3:
309 divided by 872 is 0 with a remainder of 309.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 309 leaves us with 309.
Bring next digit (6) of the dividend behind the 309 and repeat the process: 3096 / 872

On to step 4:
872 goes into 3096 3 times with a remainder of 480.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we subtract 2616 from 3096, we get 480.
Include the next digit (3) from the dividend after 480, then repeat: 4803 / 872

Moving on to step 5:
The number 872 fits into 4803 5 times, leaving a remainder of 443.
Use 5 as the next digit of our solution. 
Result so far: 35.0
If we subtract 4360 from 4803, we get 443.
Bring next digit (2) of the dividend behind the 443 and repeat the process: 4432 / 872

Advancing to step 6:
If we divide 4432 by 872, we get 5 and a remainder of 72.
Put 5 as the next digit of the answer. 
Result so far: 355.0
Subtracting 4360 from 4432 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Moving on to step 7:
720 divided by 872 is 0 with a remainder of 720.
Write down 0 as next digit of the result. 
Result so far: 355.0
If we subtract 0 from 720, we get 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

Advancing to step 8:
7200 divided by 872 is 8 with a remainder of 224.
The number 8 becomes the next digit in our result. 
Result so far: 355.08
Subtracting 6976 from 7200 leaves us with 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Let's proceed to step 9:
2240 divided by 872 is 2 with a remainder of 496.
The number 2 becomes the next digit in our result. 
Result so far: 355.082
The remainder is 496 after subtracting 1744 from 2240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

Going ahead to step 10:
872 goes into 4960 5 times with a remainder of 600.
Use 5 as the next digit of our solution. 
Result so far: 355.0825
If we subtract 4360 from 4960, we get 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Moving on to step 11:
6000 divided by 872 is 6 with a remainder of 768.
The next digit of our result is 6. 
Result so far: 355.08256
The remainder is 768 after subtracting 5232 from 6000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7680, and continue the process.

On to step 12:
When dividing 7680 by 872, we get 8 with a remainder of 704.
Write down 8 as next digit of the result. 
Result so far: 355.082568
If we take 6976 away from 7680, we end up with 704.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7040, and continue the process.

Step 13:
7040 divided by 872 is 8 with a remainder of 64.
Record the quotient 8 as the next digit in the result. 
Result so far: 355.0825688
The remainder is 64 after subtracting 6976 from 7040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

The final outcome is 355.0825688, with a leftover of 6.4e-07.