We look at the division of 413265 by 86 
The aim is to understand the frequency of 86 in 413265.

Step 1:
86 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Append the next digit (1) from the dividend to 4 and continue with: 41 / 86

Step 2:
The number 86 fits into 41 0 times, leaving a remainder of 41.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 41 after subtracting 0 from 41.
Append the next digit (3) from the dividend to 41 and continue with: 413 / 86

Going ahead to step 3:
The number 86 fits into 413 4 times, leaving a remainder of 69.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtract 344 from 413 to get 69.
Bring next digit (2) of the dividend behind the 69 and repeat the process: 692 / 86

Advancing to step 4:
The number 86 fits into 692 8 times, leaving a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 48.0
Deduct 688 from 692 and we're left with 4.
Append the next digit (6) from the dividend to 4 and continue with: 46 / 86

Advancing to step 5:
If we divide 46 by 86, we get 0 and a remainder of 46.
Use 0 as the next digit of our solution. 
Result so far: 480.0
Subtract 0 from 46 to get 46.
Include the next digit (5) from the dividend after 46, then repeat: 465 / 86

Going ahead to step 6:
465 divided by 86 is 5 with a remainder of 35.
The number 5 becomes the next digit in our result. 
Result so far: 4805.0
The remainder is 35 after subtracting 430 from 465.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 7:
86 goes into 350 4 times with a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 4805.4
Subtract 344 from 350 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 8:
The number 86 fits into 60 0 times, leaving a remainder of 60.
The next digit of our result is 0. 
Result so far: 4805.4
Subtract 0 from 60 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 9:
When dividing 600 by 86, we get 6 with a remainder of 84.
The number 6 becomes the next digit in our result. 
Result so far: 4805.406
Subtracting 516 from 600 leaves us with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

On to step 10:
The number 86 fits into 840 9 times, leaving a remainder of 66.
The next digit of our result is 9. 
Result so far: 4805.4069
Deduct 774 from 840 and we're left with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Going ahead to step 11:
86 goes into 660 7 times with a remainder of 58.
Use 7 as the next digit of our solution. 
Result so far: 4805.40697
The remainder is 58 after subtracting 602 from 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 12:
The number 86 fits into 580 6 times, leaving a remainder of 64.
Write down 6 as next digit of the result. 
Result so far: 4805.406976
Deduct 516 from 580 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 13:
When dividing 640 by 86, we get 7 with a remainder of 38.
The number 7 becomes the next digit in our result. 
Result so far: 4805.4069767
Subtracting 602 from 640 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.

Step 14:
If we divide 380 by 86, we get 4 and a remainder of 36.
Write down 4 as next digit of the result. 
Result so far: 4805.40697674
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.

The final result is 4805.40697674 with a remainder of 3.6e-08.