We're dividing 664865 by 72 
The aim is to understand the frequency of 72 in 664865.

Going ahead to step 1:
If we divide 6 by 72, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 72

Let's proceed to step 2:
66 divided by 72 is 0 with a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Bring next digit (4) of the dividend behind the 66 and repeat the process: 664 / 72

Advancing to step 3:
664 divided by 72 is 9 with a remainder of 16.
Write down 9 as next digit of the result. 
Result so far: 9.0
If we take 648 away from 664, we end up with 16.
Bring next digit (8) of the dividend behind the 16 and repeat the process: 168 / 72

Let's proceed to step 4:
The number 72 fits into 168 2 times, leaving a remainder of 24.
Put 2 as the next digit of the answer. 
Result so far: 92.0
The remainder is 24 after subtracting 144 from 168.
Append the next digit (6) from the dividend to 24 and continue with: 246 / 72

On to step 5:
72 can be fit into 246 3 times, resulting in a remainder of 30.
Write down 3 as next digit of the result. 
Result so far: 923.0
If we subtract 216 from 246, we get 30.
Include the next digit (5) from the dividend after 30, then repeat: 305 / 72

Let's proceed to step 6:
72 can be fit into 305 4 times, resulting in a remainder of 17.
The number 4 becomes the next digit in our result. 
Result so far: 9234.0
The remainder is 17 after subtracting 288 from 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 7:
If we divide 170 by 72, we get 2 and a remainder of 26.
Write down 2 as next digit of the result. 
Result so far: 9234.2
The remainder is 26 after subtracting 144 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 8:
260 divided by 72 is 3 with a remainder of 44.
The next digit of our result is 3. 
Result so far: 9234.23
The remainder is 44 after subtracting 216 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Advancing to step 9:
72 can be fit into 440 6 times, resulting in a remainder of 8.
The next digit of our result is 6. 
Result so far: 9234.236
If we take 432 away from 440, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 10:
72 goes into 80 1 times with a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 9234.2361
Subtracting 72 from 80 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 11:
If we divide 80 by 72, we get 1 and a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 9234.23611
Subtracting 72 from 80 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

After the division, we end up with 9234.23611 and a remainder of 8e-06.