We look at the division of 389235 by 86 
The aim is to understand the frequency of 86 in 389235.

Going ahead to step 1:
3 divided by 86 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Fetch the next digit (8) from the dividend, attach it to 3 and continue: 38 / 86

Step 2:
If we divide 38 by 86, we get 0 and a remainder of 38.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 38, we get 38.
Append the next digit (9) from the dividend to 38 and continue with: 389 / 86

Let's proceed to step 3:
86 can be fit into 389 4 times, resulting in a remainder of 45.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 344 from 389 and we're left with 45.
Append the next digit (2) from the dividend to 45 and continue with: 452 / 86

Going ahead to step 4:
When dividing 452 by 86, we get 5 with a remainder of 22.
Put 5 as the next digit of the answer. 
Result so far: 45.0
Subtracting 430 from 452 leaves us with 22.
Bring next digit (3) of the dividend behind the 22 and repeat the process: 223 / 86

Let's proceed to step 5:
The number 86 fits into 223 2 times, leaving a remainder of 51.
Write down 2 as next digit of the result. 
Result so far: 452.0
If we take 172 away from 223, we end up with 51.
Bring next digit (5) of the dividend behind the 51 and repeat the process: 515 / 86

On to step 6:
The number 86 fits into 515 5 times, leaving a remainder of 85.
Write down 5 as next digit of the result. 
Result so far: 4525.0
Deduct 430 from 515 and we're left with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

On to step 7:
When dividing 850 by 86, we get 9 with a remainder of 76.
Write down 9 as next digit of the result. 
Result so far: 4525.9
The remainder is 76 after subtracting 774 from 850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 8:
When dividing 760 by 86, we get 8 with a remainder of 72.
The number 8 becomes the next digit in our result. 
Result so far: 4525.98
Subtract 688 from 760 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Let's proceed to step 9:
720 divided by 86 is 8 with a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 4525.988
Subtracting 688 from 720 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Our division results in 4525.988 with a remaining 0.0032.