Let's divide 81096345 by 809
The aim is to understand the frequency of 809 in 81096345.

Step 1:
809 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 809

On to step 2:
When dividing 81 by 809, we get 0 with a remainder of 81.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Bring next digit (0) of the dividend behind the 81 and repeat the process: 810 / 809

On to step 3:
809 can be fit into 810 1 times, resulting in a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 809 from 810, we get 1.
Grab the next digit (9) from the dividend, add it to 1, then carry on: 19 / 809

Going ahead to step 4:
19 divided by 809 is 0 with a remainder of 19.
The next digit of our result is 0. 
Result so far: 10.0
If we subtract 0 from 19, we get 19.
Include the next digit (6) from the dividend after 19, then repeat: 196 / 809

Advancing to step 5:
The number 809 fits into 196 0 times, leaving a remainder of 196.
Record the quotient 0 as the next digit in the result. 
Result so far: 100.0
Subtract 0 from 196 to get 196.
Fetch the next digit (3) from the dividend, attach it to 196 and continue: 1963 / 809

Step 6:
1963 divided by 809 is 2 with a remainder of 345.
Use 2 as the next digit of our solution. 
Result so far: 1002.0
If we take 1618 away from 1963, we end up with 345.
Take the next digit (4) from the dividend and append it to 345, then repeat: 3454 / 809

Let's proceed to step 7:
If we divide 3454 by 809, we get 4 and a remainder of 218.
Put 4 as the next digit of the answer. 
Result so far: 10024.0
If we subtract 3236 from 3454, we get 218.
Append the next digit (5) from the dividend to 218 and continue with: 2185 / 809

Moving on to step 8:
If we divide 2185 by 809, we get 2 and a remainder of 567.
Record the quotient 2 as the next digit in the result. 
Result so far: 100242.0
Subtract 1618 from 2185 to get 567.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5670, and continue the process.

On to step 9:
809 can be fit into 5670 7 times, resulting in a remainder of 7.
Use 7 as the next digit of our solution. 
Result so far: 100242.7
Subtracting 5663 from 5670 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 10:
When dividing 70 by 809, we get 0 with a remainder of 70.
Put 0 as the next digit of the answer. 
Result so far: 100242.7
Subtract 0 from 70 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 11:
700 divided by 809 is 0 with a remainder of 700.
The next digit of our result is 0. 
Result so far: 100242.7
If we subtract 0 from 700, we get 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7000, and continue the process.

Our division results in 100242.7 with a remaining 0.07.