813879 ÷ 31 
The aim is to understand the frequency of 31 in 813879.

Going ahead to step 1:
8 divided by 31 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 31

Step 2:
If we divide 81 by 31, we get 2 and a remainder of 19.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 62 from 81 leaves us with 19.
Include the next digit (3) from the dividend after 19, then repeat: 193 / 31

Step 3:
When dividing 193 by 31, we get 6 with a remainder of 7.
The next digit of our result is 6. 
Result so far: 26.0
The remainder is 7 after subtracting 186 from 193.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 31

Moving on to step 4:
The number 31 fits into 78 2 times, leaving a remainder of 16.
Record the quotient 2 as the next digit in the result. 
Result so far: 262.0
If we subtract 62 from 78, we get 16.
Append the next digit (7) from the dividend to 16 and continue with: 167 / 31

Advancing to step 5:
The number 31 fits into 167 5 times, leaving a remainder of 12.
Record the quotient 5 as the next digit in the result. 
Result so far: 2625.0
If we take 155 away from 167, we end up with 12.
Append the next digit (9) from the dividend to 12 and continue with: 129 / 31

Step 6:
129 divided by 31 is 4 with a remainder of 5.
The next digit of our result is 4. 
Result so far: 26254.0
The remainder is 5 after subtracting 124 from 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 7:
When dividing 50 by 31, we get 1 with a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 26254.1
Deduct 31 from 50 and we're left 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.

Let's proceed to step 8:
31 can be fit into 190 6 times, resulting in a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 26254.16
Subtracting 186 from 190 leaves us 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.

Let's proceed to step 9:
40 divided by 31 is 1 with a remainder of 9.
The next digit of our result is 1. 
Result so far: 26254.161
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.

Let's proceed to step 10:
The number 31 fits into 90 2 times, leaving a remainder of 28.
Use 2 as the next digit of our solution. 
Result so far: 26254.1612
The remainder is 28 after subtracting 62 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 11:
The number 31 fits into 280 9 times, leaving a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 26254.16129
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 12:
31 goes into 10 0 times with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 26254.16129
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 13:
31 goes into 100 3 times with a remainder of 7.
The next digit of our result is 3. 
Result so far: 26254.1612903
Subtracting 93 from 100 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 14:
31 can be fit into 70 2 times, resulting in a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 26254.16129032
Deduct 62 from 70 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

In conclusion, the division gives 26254.16129032 with a balance of 8e-09.