We divide 638484 by 72
The aim is to understand the frequency of 72 in 638484.

Advancing to step 1:
The number 72 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 72

Let's proceed to step 2:
The number 72 fits into 63 0 times, leaving a remainder of 63.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 63 leaves us with 63.
Include the next digit (8) from the dividend after 63, then repeat: 638 / 72

Going ahead to step 3:
72 goes into 638 8 times with a remainder of 62.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtracting 576 from 638 leaves us with 62.
Take the next digit (4) from the dividend and append it to 62, then repeat: 624 / 72

Advancing to step 4:
72 goes into 624 8 times with a remainder of 48.
The number 8 becomes the next digit in our result. 
Result so far: 88.0
If we subtract 576 from 624, we get 48.
Take the next digit (8) from the dividend and append it to 48, then repeat: 488 / 72

On to step 5:
The number 72 fits into 488 6 times, leaving a remainder of 56.
The number 6 becomes the next digit in our result. 
Result so far: 886.0
Subtracting 432 from 488 leaves us with 56.
Take the next digit (4) from the dividend and append it to 56, then repeat: 564 / 72

Going ahead to step 6:
The number 72 fits into 564 7 times, leaving a remainder of 60.
The number 7 becomes the next digit in our result. 
Result so far: 8867.0
The remainder is 60 after subtracting 504 from 564.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 7:
When dividing 600 by 72, we get 8 with a remainder of 24.
Put 8 as the next digit of the answer. 
Result so far: 8867.8
The remainder is 24 after subtracting 576 from 600.
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 8:
72 goes into 240 3 times with a remainder of 24.
Write down 3 as next digit of the result. 
Result so far: 8867.83
Subtract 216 from 240 to get 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 9:
The number 72 fits into 240 3 times, leaving a remainder of 24.
The number 3 becomes the next digit in our result. 
Result so far: 8867.833
The remainder is 24 after subtracting 216 from 240.
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 outcome is 8867.833, with a leftover of 0.0024.