96421408 ÷ 831 
The aim is to understand the frequency of 831 in 96421408.

Step 1:
If we divide 9 by 831, we get 0 and a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Grab the next digit (6) from the dividend, add it to 9, then carry on: 96 / 831

Going ahead to step 2:
The number 831 fits into 96 0 times, leaving a remainder of 96.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 96 after subtracting 0 from 96.
Include the next digit (4) from the dividend after 96, then repeat: 964 / 831

On to step 3:
831 can be fit into 964 1 times, resulting in a remainder of 133.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 133 after subtracting 831 from 964.
Take the next digit (2) from the dividend and append it to 133, then repeat: 1332 / 831

On to step 4:
831 goes into 1332 1 times with a remainder of 501.
Write down 1 as next digit of the result. 
Result so far: 11.0
Deduct 831 from 1332 and we're left with 501.
Append the next digit (1) from the dividend to 501 and continue with: 5011 / 831

Let's proceed to step 5:
If we divide 5011 by 831, we get 6 and a remainder of 25.
Use 6 as the next digit of our solution. 
Result so far: 116.0
If we subtract 4986 from 5011, we get 25.
Bring next digit (4) of the dividend behind the 25 and repeat the process: 254 / 831

On to step 6:
831 goes into 254 0 times with a remainder of 254.
Put 0 as the next digit of the answer. 
Result so far: 1160.0
If we subtract 0 from 254, we get 254.
Append the next digit (0) from the dividend to 254 and continue with: 2540 / 831

Step 7:
The number 831 fits into 2540 3 times, leaving a remainder of 47.
Record the quotient 3 as the next digit in the result. 
Result so far: 11603.0
If we take 2493 away from 2540, we end up with 47.
Append the next digit (8) from the dividend to 47 and continue with: 478 / 831

Step 8:
The number 831 fits into 478 0 times, leaving a remainder of 478.
The next digit of our result is 0. 
Result so far: 116030.0
If we take 0 away from 478, we end up with 478.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4780, and continue the process.

Moving on to step 9:
If we divide 4780 by 831, we get 5 and a remainder of 625.
The next digit of our result is 5. 
Result so far: 116030.5
Subtracting 4155 from 4780 leaves us with 625.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6250, and continue the process.

On to step 10:
When dividing 6250 by 831, we get 7 with a remainder of 433.
Record the quotient 7 as the next digit in the result. 
Result so far: 116030.57
Subtract 5817 from 6250 to get 433.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4330, and continue the process.

Let's proceed to step 11:
If we divide 4330 by 831, we get 5 and a remainder of 175.
Use 5 as the next digit of our solution. 
Result so far: 116030.575
Subtracting 4155 from 4330 leaves us with 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

On to step 12:
1750 divided by 831 is 2 with a remainder of 88.
Put 2 as the next digit of the answer. 
Result so far: 116030.5752
Subtracting 1662 from 1750 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 13:
831 can be fit into 880 1 times, resulting in a remainder of 49.
The number 1 becomes the next digit in our result. 
Result so far: 116030.57521
The remainder is 49 after subtracting 831 from 880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Moving on to step 14:
When dividing 490 by 831, we get 0 with a remainder of 490.
Use 0 as the next digit of our solution. 
Result so far: 116030.57521
Subtract 0 from 490 to get 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4900, and continue the process.

Moving on to step 15:
The number 831 fits into 4900 5 times, leaving a remainder of 745.
The number 5 becomes the next digit in our result. 
Result so far: 116030.5752105
Subtracting 4155 from 4900 leaves us with 745.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7450, and continue the process.

Let's proceed to step 16:
7450 divided by 831 is 8 with a remainder of 802.
The number 8 becomes the next digit in our result. 
Result so far: 116030.57521058
The remainder is 802 after subtracting 6648 from 7450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8020, and continue the process.

The final outcome is 116030.57521058, with a leftover of 8.02e-07.