We look at the division of 820404 by 72 
The aim is to understand the frequency of 72 in 820404.

Going ahead to step 1:
When dividing 8 by 72, we get 0 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.
Grab the next digit (2) from the dividend, add it to 8, then carry on: 82 / 72

Step 2:
72 can be fit into 82 1 times, resulting in a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 72 from 82 to get 10.
Append the next digit (0) from the dividend to 10 and continue with: 100 / 72

Let's proceed to step 3:
When dividing 100 by 72, we get 1 with a remainder of 28.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
Subtract 72 from 100 to get 28.
Append the next digit (4) from the dividend to 28 and continue with: 284 / 72

Going ahead to step 4:
72 goes into 284 3 times with a remainder of 68.
The next digit of our result is 3. 
Result so far: 113.0
The remainder is 68 after subtracting 216 from 284.
Take the next digit (0) from the dividend and append it to 68, then repeat: 680 / 72

On to step 5:
The number 72 fits into 680 9 times, leaving a remainder of 32.
Put 9 as the next digit of the answer. 
Result so far: 1139.0
If we take 648 away from 680, we end up with 32.
Fetch the next digit (4) from the dividend, attach it to 32 and continue: 324 / 72

Advancing to step 6:
324 divided by 72 is 4 with a remainder of 36.
The number 4 becomes the next digit in our result. 
Result so far: 11394.0
If we take 288 away from 324, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 7:
72 goes into 360 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 11394.5
The remainder is 0 after subtracting 360 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
0 divided by 72 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 11394.5
Deduct 0 from 0 and we're left 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.

Step 9:
72 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 11394.5
The remainder is 0 after subtracting 0 from 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 outcome is 11394.5, with a leftover of 0.0.