We're dividing 603840 by 72 
The aim is to understand the frequency of 72 in 603840.

On 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
If we subtract 0 from 6, we get 6.
Take the next digit (0) from the dividend and append it to 6, then repeat: 60 / 72

Step 2:
The number 72 fits into 60 0 times, leaving a remainder of 60.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 60, we end up with 60.
Take the next digit (3) from the dividend and append it to 60, then repeat: 603 / 72

Going ahead to step 3:
If we divide 603 by 72, we get 8 and a remainder of 27.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtract 576 from 603 to get 27.
Fetch the next digit (8) from the dividend, attach it to 27 and continue: 278 / 72

Let's proceed to step 4:
278 divided by 72 is 3 with a remainder of 62.
Record the quotient 3 as the next digit in the result. 
Result so far: 83.0
Subtract 216 from 278 to get 62.
Bring next digit (4) of the dividend behind the 62 and repeat the process: 624 / 72

Let's proceed to step 5:
The number 72 fits into 624 8 times, leaving a remainder of 48.
Put 8 as the next digit of the answer. 
Result so far: 838.0
The remainder is 48 after subtracting 576 from 624.
Grab the next digit (0) from the dividend, add it to 48, then carry on: 480 / 72

Advancing to step 6:
The number 72 fits into 480 6 times, leaving a remainder of 48.
The number 6 becomes the next digit in our result. 
Result so far: 8386.0
The remainder is 48 after subtracting 432 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 7:
72 can be fit into 480 6 times, resulting in a remainder of 48.
The number 6 becomes the next digit in our result. 
Result so far: 8386.6
The remainder is 48 after subtracting 432 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 8:
72 goes into 480 6 times with a remainder of 48.
Use 6 as the next digit of our solution. 
Result so far: 8386.66
The remainder is 48 after subtracting 432 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

In conclusion, the division gives 8386.66 with a balance of 0.048.