81852386 divided by 313 
The aim is to understand the frequency of 313 in 81852386.

Step 1:
If we divide 8 by 313, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 313

On to step 2:
If we divide 81 by 313, we get 0 and a remainder of 81.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 81, we end up with 81.
Append the next digit (8) from the dividend to 81 and continue with: 818 / 313

Step 3:
The number 313 fits into 818 2 times, leaving a remainder of 192.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 626 from 818, we get 192.
Fetch the next digit (5) from the dividend, attach it to 192 and continue: 1925 / 313

Moving on to step 4:
When dividing 1925 by 313, we get 6 with a remainder of 47.
Write down 6 as next digit of the result. 
Result so far: 26.0
If we subtract 1878 from 1925, we get 47.
Take the next digit (2) from the dividend and append it to 47, then repeat: 472 / 313

Going ahead to step 5:
The number 313 fits into 472 1 times, leaving a remainder of 159.
The next digit of our result is 1. 
Result so far: 261.0
The remainder is 159 after subtracting 313 from 472.
Grab the next digit (3) from the dividend, add it to 159, then carry on: 1593 / 313

Step 6:
313 can be fit into 1593 5 times, resulting in a remainder of 28.
Use 5 as the next digit of our solution. 
Result so far: 2615.0
If we subtract 1565 from 1593, we get 28.
Include the next digit (8) from the dividend after 28, then repeat: 288 / 313

Step 7:
If we divide 288 by 313, we get 0 and a remainder of 288.
Put 0 as the next digit of the answer. 
Result so far: 26150.0
The remainder is 288 after subtracting 0 from 288.
Fetch the next digit (6) from the dividend, attach it to 288 and continue: 2886 / 313

Moving on to step 8:
2886 divided by 313 is 9 with a remainder of 69.
Record the quotient 9 as the next digit in the result. 
Result so far: 261509.0
Deduct 2817 from 2886 and we're left with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Let's proceed to step 9:
The number 313 fits into 690 2 times, leaving a remainder of 64.
The number 2 becomes the next digit in our result. 
Result so far: 261509.2
Deduct 626 from 690 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.

Going ahead to step 10:
When dividing 640 by 313, we get 2 with a remainder of 14.
Record the quotient 2 as the next digit in the result. 
Result so far: 261509.22
Subtract 626 from 640 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final outcome is 261509.22, with a leftover of 0.014.