Let's divide 864000 by 31
The aim is to understand the frequency of 31 in 864000.

Moving on to step 1:
31 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 31

Step 2:
If we divide 86 by 31, we get 2 and a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 62 from 86 and we're left with 24.
Grab the next digit (4) from the dividend, add it to 24, then carry on: 244 / 31

Let's proceed to step 3:
244 divided by 31 is 7 with a remainder of 27.
Put 7 as the next digit of the answer. 
Result so far: 27.0
The remainder is 27 after subtracting 217 from 244.
Take the next digit (0) from the dividend and append it to 27, then repeat: 270 / 31

On to step 4:
31 goes into 270 8 times with a remainder of 22.
The next digit of our result is 8. 
Result so far: 278.0
Subtract 248 from 270 to get 22.
Append the next digit (0) from the dividend to 22 and continue with: 220 / 31

Step 5:
31 goes into 220 7 times with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 2787.0
Deduct 217 from 220 and we're left with 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 31

Going ahead to step 6:
When dividing 30 by 31, we get 0 with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 27870.0
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 7:
300 divided by 31 is 9 with a remainder of 21.
The number 9 becomes the next digit in our result. 
Result so far: 27870.9
Deduct 279 from 300 and we're left 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.

On to step 8:
When dividing 210 by 31, we get 6 with a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 27870.96
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 9:
If we divide 240 by 31, we get 7 and a remainder of 23.
Put 7 as the next digit of the answer. 
Result so far: 27870.967
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.

Step 10:
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: 27870.9677
If we subtract 217 from 230, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

The final result is 27870.9677 with a remainder of 0.00013.