Let's divide 81095810 by 31
The aim is to understand the frequency of 31 in 81095810.

On to step 1:
The number 31 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 31

Moving on to step 2:
The number 31 fits into 81 2 times, leaving a remainder of 19.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 62 from 81, we get 19.
Take the next digit (0) from the dividend and append it to 19, then repeat: 190 / 31

Moving on to step 3:
190 divided by 31 is 6 with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 26.0
If we subtract 186 from 190, we get 4.
Fetch the next digit (9) from the dividend, attach it to 4 and continue: 49 / 31

Step 4:
31 can be fit into 49 1 times, resulting in a remainder of 18.
Record the quotient 1 as the next digit in the result. 
Result so far: 261.0
The remainder is 18 after subtracting 31 from 49.
Fetch the next digit (5) from the dividend, attach it to 18 and continue: 185 / 31

On to step 5:
The number 31 fits into 185 5 times, leaving a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 2615.0
Subtract 155 from 185 to get 30.
Append the next digit (8) from the dividend to 30 and continue with: 308 / 31

On to step 6:
The number 31 fits into 308 9 times, leaving a remainder of 29.
Use 9 as the next digit of our solution. 
Result so far: 26159.0
The remainder is 29 after subtracting 279 from 308.
Take the next digit (1) from the dividend and append it to 29, then repeat: 291 / 31

Going ahead to step 7:
When dividing 291 by 31, we get 9 with a remainder of 12.
Write down 9 as next digit of the result. 
Result so far: 261599.0
The remainder is 12 after subtracting 279 from 291.
Bring next digit (0) of the dividend behind the 12 and repeat the process: 120 / 31

Going ahead to step 8:
If we divide 120 by 31, we get 3 and a remainder of 27.
The number 3 becomes the next digit in our result. 
Result so far: 2615993.0
Subtracting 93 from 120 leaves us with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 9:
270 divided by 31 is 8 with a remainder of 22.
Write down 8 as next digit of the result. 
Result so far: 2615993.8
Deduct 248 from 270 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 10:
31 can be fit into 220 7 times, resulting in a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 2615993.87
If we take 217 away from 220, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 11:
31 can be fit into 30 0 times, resulting in a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 2615993.87
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 12:
If we divide 300 by 31, we get 9 and a remainder of 21.
The number 9 becomes the next digit in our result. 
Result so far: 2615993.8709
If we take 279 away from 300, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 13:
The number 31 fits into 210 6 times, leaving a remainder of 24.
The next digit of our result is 6. 
Result so far: 2615993.87096
Deduct 186 from 210 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 14:
31 can be fit into 240 7 times, resulting in a remainder of 23.
The next digit of our result is 7. 
Result so far: 2615993.870967
Deduct 217 from 240 and we're left with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 15:
If we divide 230 by 31, we get 7 and a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 2615993.8709677
Subtracting 217 from 230 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Our division results in 2615993.8709677 with a remaining 1.3e-07.