518729 divided by 86 
The aim is to understand the frequency of 86 in 518729.

Moving on to step 1:
86 goes into 5 0 times with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 86

On to step 2:
The number 86 fits into 51 0 times, leaving a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Append the next digit (8) from the dividend to 51 and continue with: 518 / 86

Let's proceed to step 3:
518 divided by 86 is 6 with a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Deduct 516 from 518 and we're left with 2.
Take the next digit (7) from the dividend and append it to 2, then repeat: 27 / 86

Advancing to step 4:
86 goes into 27 0 times with a remainder of 27.
Use 0 as the next digit of our solution. 
Result so far: 60.0
Subtract 0 from 27 to get 27.
Take the next digit (2) from the dividend and append it to 27, then repeat: 272 / 86

Moving on to step 5:
272 divided by 86 is 3 with a remainder of 14.
The next digit of our result is 3. 
Result so far: 603.0
The remainder is 14 after subtracting 258 from 272.
Fetch the next digit (9) from the dividend, attach it to 14 and continue: 149 / 86

Step 6:
The number 86 fits into 149 1 times, leaving a remainder of 63.
Put 1 as the next digit of the answer. 
Result so far: 6031.0
Deduct 86 from 149 and we're left with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Step 7:
630 divided by 86 is 7 with a remainder of 28.
Put 7 as the next digit of the answer. 
Result so far: 6031.7
If we take 602 away from 630, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 8:
280 divided by 86 is 3 with a remainder of 22.
Record the quotient 3 as the next digit in the result. 
Result so far: 6031.73
Subtract 258 from 280 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 9:
220 divided by 86 is 2 with a remainder of 48.
The next digit of our result is 2. 
Result so far: 6031.732
The remainder is 48 after subtracting 172 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 10:
86 goes into 480 5 times with a remainder of 50.
The next digit of our result is 5. 
Result so far: 6031.7325
Deduct 430 from 480 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 11:
500 divided by 86 is 5 with a remainder of 70.
Put 5 as the next digit of the answer. 
Result so far: 6031.73255
If we subtract 430 from 500, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The final outcome is 6031.73255, with a leftover of 7e-05.