We look at the division of 255837 by 86 
The aim is to understand the frequency of 86 in 255837.

Going ahead to step 1:
2 divided by 86 is 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 86

On to step 2:
If we divide 25 by 86, we get 0 and a remainder of 25.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 25 to get 25.
Include the next digit (5) from the dividend after 25, then repeat: 255 / 86

Moving on to step 3:
86 can be fit into 255 2 times, resulting in a remainder of 83.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 172 from 255 to get 83.
Fetch the next digit (8) from the dividend, attach it to 83 and continue: 838 / 86

Step 4:
If we divide 838 by 86, we get 9 and a remainder of 64.
Use 9 as the next digit of our solution. 
Result so far: 29.0
Subtracting 774 from 838 leaves us with 64.
Take the next digit (3) from the dividend and append it to 64, then repeat: 643 / 86

Moving on to step 5:
643 divided by 86 is 7 with a remainder of 41.
The number 7 becomes the next digit in our result. 
Result so far: 297.0
If we take 602 away from 643, we end up with 41.
Take the next digit (7) from the dividend and append it to 41, then repeat: 417 / 86

On to step 6:
86 goes into 417 4 times with a remainder of 73.
Record the quotient 4 as the next digit in the result. 
Result so far: 2974.0
Deduct 344 from 417 and we're left with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Advancing to step 7:
86 goes into 730 8 times with a remainder of 42.
The number 8 becomes the next digit in our result. 
Result so far: 2974.8
Deduct 688 from 730 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 8:
If we divide 420 by 86, we get 4 and a remainder of 76.
Write down 4 as next digit of the result. 
Result so far: 2974.84
If we take 344 away from 420, we end up with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Going ahead to step 9:
760 divided by 86 is 8 with a remainder of 72.
The next digit of our result is 8. 
Result so far: 2974.848
The remainder is 72 after subtracting 688 from 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Going ahead to step 10:
720 divided by 86 is 8 with a remainder of 32.
The number 8 becomes the next digit in our result. 
Result so far: 2974.8488
The remainder is 32 after subtracting 688 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

After the division, we end up with 2974.8488 and a remainder of 0.00032.