Let's divide 312687 by 86
The aim is to understand the frequency of 86 in 312687.

Moving on to step 1:
If we divide 3 by 86, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 86

Going ahead to step 2:
If we divide 31 by 86, we get 0 and a remainder of 31.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 31 after subtracting 0 from 31.
Grab the next digit (2) from the dividend, add it to 31, then carry on: 312 / 86

Advancing to step 3:
312 divided by 86 is 3 with a remainder of 54.
Put 3 as the next digit of the answer. 
Result so far: 3.0
The remainder is 54 after subtracting 258 from 312.
Append the next digit (6) from the dividend to 54 and continue with: 546 / 86

Step 4:
When dividing 546 by 86, we get 6 with a remainder of 30.
The next digit of our result is 6. 
Result so far: 36.0
If we take 516 away from 546, we end up with 30.
Append the next digit (8) from the dividend to 30 and continue with: 308 / 86

Advancing to step 5:
If we divide 308 by 86, we get 3 and a remainder of 50.
Put 3 as the next digit of the answer. 
Result so far: 363.0
The remainder is 50 after subtracting 258 from 308.
Bring next digit (7) of the dividend behind the 50 and repeat the process: 507 / 86

Moving on to step 6:
The number 86 fits into 507 5 times, leaving a remainder of 77.
Record the quotient 5 as the next digit in the result. 
Result so far: 3635.0
Subtracting 430 from 507 leaves us with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Going ahead to step 7:
When dividing 770 by 86, we get 8 with a remainder of 82.
The next digit of our result is 8. 
Result so far: 3635.8
The remainder is 82 after subtracting 688 from 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Let's proceed to step 8:
When dividing 820 by 86, we get 9 with a remainder of 46.
Record the quotient 9 as the next digit in the result. 
Result so far: 3635.89
If we subtract 774 from 820, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 9:
If we divide 460 by 86, we get 5 and a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 3635.895
Subtracting 430 from 460 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 10:
300 divided by 86 is 3 with a remainder of 42.
Put 3 as the next digit of the answer. 
Result so far: 3635.8953
If we take 258 away from 300, we end up 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.

Step 11:
420 divided by 86 is 4 with a remainder of 76.
Use 4 as the next digit of our solution. 
Result so far: 3635.89534
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.

Moving on to step 12:
86 goes into 760 8 times with a remainder of 72.
The next digit of our result is 8. 
Result so far: 3635.895348
Subtracting 688 from 760 leaves us with 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 13:
The number 86 fits into 720 8 times, leaving a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 3635.8953488
If we subtract 688 from 720, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

In conclusion, the division gives 3635.8953488 with a balance of 3.2e-07.