993021 ÷ 72 
The aim is to understand the frequency of 72 in 993021.

Advancing to step 1:
The number 72 fits into 9 0 times, leaving a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 72

On to step 2:
When dividing 99 by 72, we get 1 with a remainder of 27.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 72 from 99 and we're left with 27.
Append the next digit (3) from the dividend to 27 and continue with: 273 / 72

Let's proceed to step 3:
The number 72 fits into 273 3 times, leaving a remainder of 57.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
Subtract 216 from 273 to get 57.
Fetch the next digit (0) from the dividend, attach it to 57 and continue: 570 / 72

On to step 4:
72 can be fit into 570 7 times, resulting in a remainder of 66.
Use 7 as the next digit of our solution. 
Result so far: 137.0
If we take 504 away from 570, we end up with 66.
Fetch the next digit (2) from the dividend, attach it to 66 and continue: 662 / 72

Moving on to step 5:
662 divided by 72 is 9 with a remainder of 14.
Record the quotient 9 as the next digit in the result. 
Result so far: 1379.0
If we subtract 648 from 662, we get 14.
Include the next digit (1) from the dividend after 14, then repeat: 141 / 72

Moving on to step 6:
141 divided by 72 is 1 with a remainder of 69.
The number 1 becomes the next digit in our result. 
Result so far: 13791.0
If we subtract 72 from 141, we get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Step 7:
If we divide 690 by 72, we get 9 and a remainder of 42.
The next digit of our result is 9. 
Result so far: 13791.9
Subtract 648 from 690 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 8:
420 divided by 72 is 5 with a remainder of 60.
Write down 5 as next digit of the result. 
Result so far: 13791.95
Deduct 360 from 420 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 9:
72 can be fit into 600 8 times, resulting in a remainder of 24.
Use 8 as the next digit of our solution. 
Result so far: 13791.958
Subtracting 576 from 600 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 10:
If we divide 240 by 72, we get 3 and a remainder of 24.
Record the quotient 3 as the next digit in the result. 
Result so far: 13791.9583
If we take 216 away from 240, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 11:
240 divided by 72 is 3 with a remainder of 24.
The number 3 becomes the next digit in our result. 
Result so far: 13791.95833
If we take 216 away from 240, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

The final result is 13791.95833 with a remainder of 2.4e-05.