We look at the division of 499686 by 86 
The aim is to understand the frequency of 86 in 499686.

On to step 1:
When dividing 4 by 86, we get 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Append the next digit (9) from the dividend to 4 and continue with: 49 / 86

Advancing to step 2:
The number 86 fits into 49 0 times, leaving a remainder of 49.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 49 leaves us with 49.
Include the next digit (9) from the dividend after 49, then repeat: 499 / 86

Advancing to step 3:
499 divided by 86 is 5 with a remainder of 69.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtracting 430 from 499 leaves us with 69.
Include the next digit (6) from the dividend after 69, then repeat: 696 / 86

Advancing to step 4:
If we divide 696 by 86, we get 8 and a remainder of 8.
The number 8 becomes the next digit in our result. 
Result so far: 58.0
If we subtract 688 from 696, we get 8.
Grab the next digit (8) from the dividend, add it to 8, then carry on: 88 / 86

On to step 5:
The number 86 fits into 88 1 times, leaving a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 581.0
Subtract 86 from 88 to get 2.
Include the next digit (6) from the dividend after 2, then repeat: 26 / 86

Advancing to step 6:
26 divided by 86 is 0 with a remainder of 26.
The number 0 becomes the next digit in our result. 
Result so far: 5810.0
Subtracting 0 from 26 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 7:
86 goes into 260 3 times with a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 5810.3
Subtract 258 from 260 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 8:
The number 86 fits into 20 0 times, leaving a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 5810.3
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 9:
If we divide 200 by 86, we get 2 and a remainder of 28.
The number 2 becomes the next digit in our result. 
Result so far: 5810.302
If we take 172 away from 200, 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.

On to step 10:
280 divided by 86 is 3 with a remainder of 22.
The number 3 becomes the next digit in our result. 
Result so far: 5810.3023
If we subtract 258 from 280, we 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.

Let's proceed to step 11:
The number 86 fits into 220 2 times, leaving a remainder of 48.
Put 2 as the next digit of the answer. 
Result so far: 5810.30232
Subtracting 172 from 220 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 12:
The number 86 fits into 480 5 times, leaving a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 5810.302325
The remainder is 50 after subtracting 430 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 13:
When dividing 500 by 86, we get 5 with a remainder of 70.
Put 5 as the next digit of the answer. 
Result so far: 5810.3023255
Deduct 430 from 500 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

After the division, we end up with 5810.3023255 and a remainder of 7e-07.