We're dividing 363960 by 72 
The aim is to understand the frequency of 72 in 363960.

Step 1:
If we divide 3 by 72, we get 0 and a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Fetch the next digit (6) from the dividend, attach it to 3 and continue: 36 / 72

Let's proceed to step 2:
If we divide 36 by 72, we get 0 and a remainder of 36.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 36, we get 36.
Take the next digit (3) from the dividend and append it to 36, then repeat: 363 / 72

Step 3:
The number 72 fits into 363 5 times, leaving a remainder of 3.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtracting 360 from 363 leaves us with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 72

On to step 4:
72 goes into 39 0 times with a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 50.0
Subtracting 0 from 39 leaves us with 39.
Bring next digit (6) of the dividend behind the 39 and repeat the process: 396 / 72

Moving on to step 5:
The number 72 fits into 396 5 times, leaving a remainder of 36.
The next digit of our result is 5. 
Result so far: 505.0
The remainder is 36 after subtracting 360 from 396.
Bring next digit (0) of the dividend behind the 36 and repeat the process: 360 / 72

Step 6:
If we divide 360 by 72, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 5055.0
If we take 360 away from 360, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 7:
When dividing 0 by 72, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 5055.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
0 divided by 72 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 5055.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 5055.0, and the remainder is 0.0.