We look at the division of 10813353 by 909 
The aim is to understand the frequency of 909 in 10813353.

Step 1:
If we divide 1 by 909, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Include the next digit (0) from the dividend after 1, then repeat: 10 / 909

Advancing to step 2:
909 goes into 10 0 times with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 10 and we're left with 10.
Grab the next digit (8) from the dividend, add it to 10, then carry on: 108 / 909

Moving on to step 3:
108 divided by 909 is 0 with a remainder of 108.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 108 leaves us with 108.
Take the next digit (1) from the dividend and append it to 108, then repeat: 1081 / 909

Let's proceed to step 4:
909 goes into 1081 1 times with a remainder of 172.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 909 from 1081, we get 172.
Include the next digit (3) from the dividend after 172, then repeat: 1723 / 909

Let's proceed to step 5:
1723 divided by 909 is 1 with a remainder of 814.
Write down 1 as next digit of the result. 
Result so far: 11.0
Subtract 909 from 1723 to get 814.
Include the next digit (3) from the dividend after 814, then repeat: 8143 / 909

Step 6:
909 can be fit into 8143 8 times, resulting in a remainder of 871.
Write down 8 as next digit of the result. 
Result so far: 118.0
If we subtract 7272 from 8143, we get 871.
Append the next digit (5) from the dividend to 871 and continue with: 8715 / 909

Advancing to step 7:
If we divide 8715 by 909, we get 9 and a remainder of 534.
Write down 9 as next digit of the result. 
Result so far: 1189.0
Subtracting 8181 from 8715 leaves us with 534.
Bring next digit (3) of the dividend behind the 534 and repeat the process: 5343 / 909

Let's proceed to step 8:
909 goes into 5343 5 times with a remainder of 798.
Use 5 as the next digit of our solution. 
Result so far: 11895.0
If we take 4545 away from 5343, we end up with 798.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7980, and continue the process.

Going ahead to step 9:
909 goes into 7980 8 times with a remainder of 708.
The next digit of our result is 8. 
Result so far: 11895.8
The remainder is 708 after subtracting 7272 from 7980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7080, and continue the process.

Going ahead to step 10:
909 can be fit into 7080 7 times, resulting in a remainder of 717.
Write down 7 as next digit of the result. 
Result so far: 11895.87
If we subtract 6363 from 7080, we get 717.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7170, and continue the process.

Moving on to step 11:
When dividing 7170 by 909, we get 7 with a remainder of 807.
Write down 7 as next digit of the result. 
Result so far: 11895.877
Deduct 6363 from 7170 and we're left with 807.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8070, and continue the process.

After the division, we end up with 11895.877 and a remainder of 0.0807.