We're dividing 82513881 by 809 
The aim is to understand the frequency of 809 in 82513881.

Going ahead to step 1:
809 can be fit into 8 0 times, resulting in a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (2) from the dividend to 8 and continue with: 82 / 809

Step 2:
The number 809 fits into 82 0 times, leaving a remainder of 82.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 82 to get 82.
Bring next digit (5) of the dividend behind the 82 and repeat the process: 825 / 809

Advancing to step 3:
The number 809 fits into 825 1 times, leaving a remainder of 16.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 809 from 825 and we're left with 16.
Fetch the next digit (1) from the dividend, attach it to 16 and continue: 161 / 809

Going ahead to step 4:
The number 809 fits into 161 0 times, leaving a remainder of 161.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Subtracting 0 from 161 leaves us with 161.
Bring next digit (3) of the dividend behind the 161 and repeat the process: 1613 / 809

Moving on to step 5:
809 goes into 1613 1 times with a remainder of 804.
Write down 1 as next digit of the result. 
Result so far: 101.0
Deduct 809 from 1613 and we're left with 804.
Include the next digit (8) from the dividend after 804, then repeat: 8048 / 809

Going ahead to step 6:
809 goes into 8048 9 times with a remainder of 767.
Put 9 as the next digit of the answer. 
Result so far: 1019.0
If we take 7281 away from 8048, we end up with 767.
Append the next digit (8) from the dividend to 767 and continue with: 7678 / 809

Let's proceed to step 7:
When dividing 7678 by 809, we get 9 with a remainder of 397.
Put 9 as the next digit of the answer. 
Result so far: 10199.0
The remainder is 397 after subtracting 7281 from 7678.
Bring next digit (1) of the dividend behind the 397 and repeat the process: 3971 / 809

Going ahead to step 8:
When dividing 3971 by 809, we get 4 with a remainder of 735.
Write down 4 as next digit of the result. 
Result so far: 101994.0
The remainder is 735 after subtracting 3236 from 3971.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7350, and continue the process.

Going ahead to step 9:
7350 divided by 809 is 9 with a remainder of 69.
Record the quotient 9 as the next digit in the result. 
Result so far: 101994.9
If we subtract 7281 from 7350, we get 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 10:
The number 809 fits into 690 0 times, leaving a remainder of 690.
Record the quotient 0 as the next digit in the result. 
Result so far: 101994.9
Subtract 0 from 690 to get 690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6900, and continue the process.

Step 11:
6900 divided by 809 is 8 with a remainder of 428.
Use 8 as the next digit of our solution. 
Result so far: 101994.908
Subtract 6472 from 6900 to get 428.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

Moving on to step 12:
When dividing 4280 by 809, we get 5 with a remainder of 235.
The next digit of our result is 5. 
Result so far: 101994.9085
Subtract 4045 from 4280 to get 235.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

Let's proceed to step 13:
809 can be fit into 2350 2 times, resulting in a remainder of 732.
Record the quotient 2 as the next digit in the result. 
Result so far: 101994.90852
If we subtract 1618 from 2350, we get 732.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7320, and continue the process.

On to step 14:
When dividing 7320 by 809, we get 9 with a remainder of 39.
Record the quotient 9 as the next digit in the result. 
Result so far: 101994.908529
The remainder is 39 after subtracting 7281 from 7320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Going ahead to step 15:
When dividing 390 by 809, we get 0 with a remainder of 390.
Put 0 as the next digit of the answer. 
Result so far: 101994.908529
Subtract 0 from 390 to get 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Moving on to step 16:
If we divide 3900 by 809, we get 4 and a remainder of 664.
The next digit of our result is 4. 
Result so far: 101994.90852904
Subtract 3236 from 3900 to get 664.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6640, and continue the process.

The final outcome is 101994.90852904, with a leftover of 6.64e-07.