8391829 divided by 31 
The aim is to understand the frequency of 31 in 8391829.

Advancing to step 1:
If we divide 8 by 31, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 31

Let's proceed to step 2:
The number 31 fits into 83 2 times, leaving a remainder of 21.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 62 from 83 to get 21.
Bring next digit (9) of the dividend behind the 21 and repeat the process: 219 / 31

Going ahead to step 3:
31 goes into 219 7 times with a remainder of 2.
Put 7 as the next digit of the answer. 
Result so far: 27.0
If we take 217 away from 219, we end up with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 31

Going ahead to step 4:
The number 31 fits into 21 0 times, leaving a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 270.0
Deduct 0 from 21 and we're left with 21.
Grab the next digit (8) from the dividend, add it to 21, then carry on: 218 / 31

Moving on to step 5:
218 divided by 31 is 7 with a remainder of 1.
The next digit of our result is 7. 
Result so far: 2707.0
If we subtract 217 from 218, we get 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 31

Going ahead to step 6:
31 can be fit into 12 0 times, resulting in a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 27070.0
The remainder is 12 after subtracting 0 from 12.
Grab the next digit (9) from the dividend, add it to 12, then carry on: 129 / 31

Step 7:
The number 31 fits into 129 4 times, leaving a remainder of 5.
Use 4 as the next digit of our solution. 
Result so far: 270704.0
Subtract 124 from 129 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 8:
31 goes into 50 1 times with a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 270704.1
If we take 31 away from 50, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 9:
The number 31 fits into 190 6 times, leaving a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 270704.16
If we take 186 away from 190, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 10:
31 can be fit into 40 1 times, resulting in a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 270704.161
Subtracting 31 from 40 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 11:
31 can be fit into 90 2 times, resulting in a remainder of 28.
Use 2 as the next digit of our solution. 
Result so far: 270704.1612
Subtract 62 from 90 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 12:
31 can be fit into 280 9 times, resulting in a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 270704.16129
If we subtract 279 from 280, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 13:
31 can be fit into 10 0 times, resulting in a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 270704.16129
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 14:
When dividing 100 by 31, we get 3 with a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 270704.1612903
If we subtract 93 from 100, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 15:
70 divided by 31 is 2 with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 270704.16129032
If we subtract 62 from 70, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Our division results in 270704.16129032 with a remaining 8e-09.