Let's divide 81083471 by 809
The aim is to understand the frequency of 809 in 81083471.

Advancing to step 1:
809 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 809

Moving on to step 2:
809 can be fit into 81 0 times, resulting in a remainder of 81.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 81 leaves us with 81.
Include the next digit (0) from the dividend after 81, then repeat: 810 / 809

Moving on to step 3:
The number 809 fits into 810 1 times, leaving a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 809 from 810, we get 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 809

Advancing to step 4:
18 divided by 809 is 0 with a remainder of 18.
The next digit of our result is 0. 
Result so far: 10.0
Subtract 0 from 18 to get 18.
Include the next digit (3) from the dividend after 18, then repeat: 183 / 809

Step 5:
If we divide 183 by 809, we get 0 and a remainder of 183.
Record the quotient 0 as the next digit in the result. 
Result so far: 100.0
If we take 0 away from 183, we end up with 183.
Include the next digit (4) from the dividend after 183, then repeat: 1834 / 809

Moving on to step 6:
809 can be fit into 1834 2 times, resulting in a remainder of 216.
Write down 2 as next digit of the result. 
Result so far: 1002.0
Subtract 1618 from 1834 to get 216.
Grab the next digit (7) from the dividend, add it to 216, then carry on: 2167 / 809

Moving on to step 7:
809 can be fit into 2167 2 times, resulting in a remainder of 549.
Record the quotient 2 as the next digit in the result. 
Result so far: 10022.0
Deduct 1618 from 2167 and we're left with 549.
Take the next digit (1) from the dividend and append it to 549, then repeat: 5491 / 809

Moving on to step 8:
809 goes into 5491 6 times with a remainder of 637.
The number 6 becomes the next digit in our result. 
Result so far: 100226.0
If we take 4854 away from 5491, we end up with 637.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6370, and continue the process.

Advancing to step 9:
The number 809 fits into 6370 7 times, leaving a remainder of 707.
Put 7 as the next digit of the answer. 
Result so far: 100226.7
Subtract 5663 from 6370 to get 707.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7070, and continue the process.

Step 10:
809 goes into 7070 8 times with a remainder of 598.
The number 8 becomes the next digit in our result. 
Result so far: 100226.78
If we subtract 6472 from 7070, we get 598.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5980, and continue the process.

On to step 11:
The number 809 fits into 5980 7 times, leaving a remainder of 317.
The number 7 becomes the next digit in our result. 
Result so far: 100226.787
Subtracting 5663 from 5980 leaves us with 317.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3170, and continue the process.

On to step 12:
809 goes into 3170 3 times with a remainder of 743.
Put 3 as the next digit of the answer. 
Result so far: 100226.7873
If we take 2427 away from 3170, we end up with 743.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7430, and continue the process.

Advancing to step 13:
7430 divided by 809 is 9 with a remainder of 149.
Write down 9 as next digit of the result. 
Result so far: 100226.78739
Subtract 7281 from 7430 to get 149.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

Going ahead to step 14:
The number 809 fits into 1490 1 times, leaving a remainder of 681.
Record the quotient 1 as the next digit in the result. 
Result so far: 100226.787391
If we subtract 809 from 1490, we get 681.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6810, and continue the process.

Step 15:
When dividing 6810 by 809, we get 8 with a remainder of 338.
Use 8 as the next digit of our solution. 
Result so far: 100226.7873918
Subtracting 6472 from 6810 leaves us with 338.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3380, and continue the process.

Advancing to step 16:
3380 divided by 809 is 4 with a remainder of 144.
Record the quotient 4 as the next digit in the result. 
Result so far: 100226.78739184
Subtract 3236 from 3380 to get 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

The final result is 100226.78739184 with a remainder of 1.44e-07.