We look at the division of 81712465 by 864 
The aim is to understand the frequency of 864 in 81712465.

Let's proceed to step 1:
The number 864 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 864

On to step 2:
If we divide 81 by 864, we get 0 and a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Include the next digit (7) from the dividend after 81, then repeat: 817 / 864

Going ahead to step 3:
The number 864 fits into 817 0 times, leaving a remainder of 817.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 817, we end up with 817.
Fetch the next digit (1) from the dividend, attach it to 817 and continue: 8171 / 864

Let's proceed to step 4:
The number 864 fits into 8171 9 times, leaving a remainder of 395.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Deduct 7776 from 8171 and we're left with 395.
Grab the next digit (2) from the dividend, add it to 395, then carry on: 3952 / 864

Moving on to step 5:
The number 864 fits into 3952 4 times, leaving a remainder of 496.
The next digit of our result is 4. 
Result so far: 94.0
Deduct 3456 from 3952 and we're left with 496.
Grab the next digit (4) from the dividend, add it to 496, then carry on: 4964 / 864

On to step 6:
The number 864 fits into 4964 5 times, leaving a remainder of 644.
Write down 5 as next digit of the result. 
Result so far: 945.0
Deduct 4320 from 4964 and we're left with 644.
Bring next digit (6) of the dividend behind the 644 and repeat the process: 6446 / 864

Going ahead to step 7:
864 goes into 6446 7 times with a remainder of 398.
The number 7 becomes the next digit in our result. 
Result so far: 9457.0
Subtracting 6048 from 6446 leaves us with 398.
Include the next digit (5) from the dividend after 398, then repeat: 3985 / 864

Advancing to step 8:
When dividing 3985 by 864, we get 4 with a remainder of 529.
The number 4 becomes the next digit in our result. 
Result so far: 94574.0
If we take 3456 away from 3985, we end up with 529.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5290, and continue the process.

Moving on to step 9:
If we divide 5290 by 864, we get 6 and a remainder of 106.
Use 6 as the next digit of our solution. 
Result so far: 94574.6
Subtracting 5184 from 5290 leaves us with 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

Let's proceed to step 10:
The number 864 fits into 1060 1 times, leaving a remainder of 196.
Use 1 as the next digit of our solution. 
Result so far: 94574.61
If we take 864 away from 1060, we end up with 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Let's proceed to step 11:
1960 divided by 864 is 2 with a remainder of 232.
Put 2 as the next digit of the answer. 
Result so far: 94574.612
If we take 1728 away from 1960, we end up with 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Going ahead to step 12:
2320 divided by 864 is 2 with a remainder of 592.
The number 2 becomes the next digit in our result. 
Result so far: 94574.6122
If we take 1728 away from 2320, we end up with 592.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5920, and continue the process.

The final result is 94574.6122 with a remainder of 0.00592.