391634 ÷ 86 
The aim is to understand the frequency of 86 in 391634.

On to step 1:
86 can be fit into 3 0 times, resulting in a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 86

Going ahead to step 2:
86 goes into 39 0 times with a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 39, we get 39.
Grab the next digit (1) from the dividend, add it to 39, then carry on: 391 / 86

Moving on to step 3:
When dividing 391 by 86, we get 4 with a remainder of 47.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 344 from 391 and we're left with 47.
Bring next digit (6) of the dividend behind the 47 and repeat the process: 476 / 86

Going ahead to step 4:
The number 86 fits into 476 5 times, leaving a remainder of 46.
Record the quotient 5 as the next digit in the result. 
Result so far: 45.0
Subtract 430 from 476 to get 46.
Fetch the next digit (3) from the dividend, attach it to 46 and continue: 463 / 86

Advancing to step 5:
The number 86 fits into 463 5 times, leaving a remainder of 33.
Record the quotient 5 as the next digit in the result. 
Result so far: 455.0
Deduct 430 from 463 and we're left with 33.
Include the next digit (4) from the dividend after 33, then repeat: 334 / 86

Moving on to step 6:
If we divide 334 by 86, we get 3 and a remainder of 76.
Write down 3 as next digit of the result. 
Result so far: 4553.0
Subtract 258 from 334 to get 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 7:
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: 4553.8
If we subtract 688 from 760, we 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 8:
720 divided by 86 is 8 with a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 4553.88
If we take 688 away from 720, we end up 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 4553.88 with a remaining 0.032.