821813 ÷ 23 
The aim is to understand the frequency of 23 in 821813.

Step 1:
8 divided by 23 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (2) from the dividend and append it to 8, then repeat: 82 / 23

Advancing to step 2:
When dividing 82 by 23, we get 3 with a remainder of 13.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 69 from 82 leaves us with 13.
Include the next digit (1) from the dividend after 13, then repeat: 131 / 23

Moving on to step 3:
131 divided by 23 is 5 with a remainder of 16.
The next digit of our result is 5. 
Result so far: 35.0
The remainder is 16 after subtracting 115 from 131.
Bring next digit (8) of the dividend behind the 16 and repeat the process: 168 / 23

Going ahead to step 4:
23 can be fit into 168 7 times, resulting in a remainder of 7.
Put 7 as the next digit of the answer. 
Result so far: 357.0
If we subtract 161 from 168, we get 7.
Bring next digit (1) of the dividend behind the 7 and repeat the process: 71 / 23

On to step 5:
71 divided by 23 is 3 with a remainder of 2.
Write down 3 as next digit of the result. 
Result so far: 3573.0
If we take 69 away from 71, we end up with 2.
Take the next digit (3) from the dividend and append it to 2, then repeat: 23 / 23

Advancing to step 6:
23 can be fit into 23 1 times, resulting in a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 35731.0
If we take 23 away from 23, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 7:
23 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 35731.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
When dividing 0 by 23, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 35731.0
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 35731.0 with a remainder of 0.0.