823729 divided by 86 
The aim is to understand the frequency of 86 in 823729.

Let's proceed to step 1:
The number 86 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (2) from the dividend and append it to 8, then repeat: 82 / 86

On to step 2:
86 can be fit into 82 0 times, resulting in a remainder of 82.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 82 and we're left with 82.
Bring next digit (3) of the dividend behind the 82 and repeat the process: 823 / 86

Advancing to step 3:
If we divide 823 by 86, we get 9 and a remainder of 49.
The next digit of our result is 9. 
Result so far: 9.0
The remainder is 49 after subtracting 774 from 823.
Bring next digit (7) of the dividend behind the 49 and repeat the process: 497 / 86

Moving on to step 4:
If we divide 497 by 86, we get 5 and a remainder of 67.
Record the quotient 5 as the next digit in the result. 
Result so far: 95.0
Deduct 430 from 497 and we're left with 67.
Include the next digit (2) from the dividend after 67, then repeat: 672 / 86

Going ahead to step 5:
The number 86 fits into 672 7 times, leaving a remainder of 70.
Record the quotient 7 as the next digit in the result. 
Result so far: 957.0
Subtracting 602 from 672 leaves us with 70.
Bring next digit (9) of the dividend behind the 70 and repeat the process: 709 / 86

Going ahead to step 6:
86 goes into 709 8 times with a remainder of 21.
The next digit of our result is 8. 
Result so far: 9578.0
If we take 688 away from 709, 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.

Step 7:
86 goes into 210 2 times with a remainder of 38.
Use 2 as the next digit of our solution. 
Result so far: 9578.2
Subtracting 172 from 210 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 8:
If we divide 380 by 86, we get 4 and a remainder of 36.
The next digit of our result is 4. 
Result so far: 9578.24
Subtract 344 from 380 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 9:
If we divide 360 by 86, we get 4 and a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 9578.244
Deduct 344 from 360 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final outcome is 9578.244, with a leftover of 0.0016.