664863 divided by 72 
The aim is to understand the frequency of 72 in 664863.

Let's proceed to step 1:
If we divide 6 by 72, we get 0 and a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 72

Going ahead to step 2:
If we divide 66 by 72, we get 0 and a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Append the next digit (4) from the dividend to 66 and continue with: 664 / 72

Going ahead to step 3:
72 can be fit into 664 9 times, resulting in a remainder of 16.
Put 9 as the next digit of the answer. 
Result so far: 9.0
The remainder is 16 after subtracting 648 from 664.
Take the next digit (8) from the dividend and append it to 16, then repeat: 168 / 72

Moving on to step 4:
168 divided by 72 is 2 with a remainder of 24.
Record the quotient 2 as the next digit in the result. 
Result so far: 92.0
Subtracting 144 from 168 leaves us with 24.
Take the next digit (6) from the dividend and append it to 24, then repeat: 246 / 72

Going ahead to step 5:
The number 72 fits into 246 3 times, leaving a remainder of 30.
Use 3 as the next digit of our solution. 
Result so far: 923.0
The remainder is 30 after subtracting 216 from 246.
Include the next digit (3) from the dividend after 30, then repeat: 303 / 72

Advancing to step 6:
303 divided by 72 is 4 with a remainder of 15.
Use 4 as the next digit of our solution. 
Result so far: 9234.0
If we subtract 288 from 303, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 7:
72 can be fit into 150 2 times, resulting in a remainder of 6.
Write down 2 as next digit of the result. 
Result so far: 9234.2
The remainder is 6 after subtracting 144 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 8:
72 can be fit into 60 0 times, resulting in a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 9234.2
Subtract 0 from 60 to get 60.
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 9:
If we divide 600 by 72, we get 8 and a remainder of 24.
The next digit of our result is 8. 
Result so far: 9234.208
Deduct 576 from 600 and we're left 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.

Going ahead to step 10:
72 goes into 240 3 times with a remainder of 24.
Use 3 as the next digit of our solution. 
Result so far: 9234.2083
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.

Moving on to step 11:
72 can be fit into 240 3 times, resulting in a remainder of 24.
The next digit of our result is 3. 
Result so far: 9234.20833
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 9234.20833, with a leftover of 2.4e-05.