396721 divided by 72 
The aim is to understand the frequency of 72 in 396721.

Step 1:
72 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 72

Step 2:
When dividing 39 by 72, we get 0 with a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Include the next digit (6) from the dividend after 39, then repeat: 396 / 72

Going ahead to step 3:
If we divide 396 by 72, we get 5 and a remainder of 36.
Write down 5 as next digit of the result. 
Result so far: 5.0
If we take 360 away from 396, we end up with 36.
Bring next digit (7) of the dividend behind the 36 and repeat the process: 367 / 72

Step 4:
72 can be fit into 367 5 times, resulting in a remainder of 7.
The next digit of our result is 5. 
Result so far: 55.0
Deduct 360 from 367 and we're left with 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 72

Moving on to step 5:
When dividing 72 by 72, we get 1 with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 551.0
If we subtract 72 from 72, we get 0.
Grab the next digit (1) from the dividend, add it to 0, then carry on: 1 / 72

Moving on to step 6:
When dividing 1 by 72, we get 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 5510.0
Subtract 0 from 1 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 7:
If we divide 10 by 72, we get 0 and a remainder of 10.
The next digit of our result is 0. 
Result so far: 5510.0
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
72 goes into 100 1 times with a remainder of 28.
Record the quotient 1 as the next digit in the result. 
Result so far: 5510.01
Deduct 72 from 100 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 9:
72 can be fit into 280 3 times, resulting in a remainder of 64.
Write down 3 as next digit of the result. 
Result so far: 5510.013
The remainder is 64 after subtracting 216 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

On to step 10:
640 divided by 72 is 8 with a remainder of 64.
Record the quotient 8 as the next digit in the result. 
Result so far: 5510.0138
The remainder is 64 after subtracting 576 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 11:
72 can be fit into 640 8 times, resulting in a remainder of 64.
Use 8 as the next digit of our solution. 
Result so far: 5510.01388
The remainder is 64 after subtracting 576 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Our division results in 5510.01388 with a remaining 6.4e-05.