We look at the division of 50791 by 72 
The aim is to understand the frequency of 72 in 50791.

On to step 1:
72 can be fit into 5 0 times, resulting in a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Include the next digit (0) from the dividend after 5, then repeat: 50 / 72

Going ahead to step 2:
72 can be fit into 50 0 times, resulting in a remainder of 50.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 50, we get 50.
Bring next digit (7) of the dividend behind the 50 and repeat the process: 507 / 72

Moving on to step 3:
72 goes into 507 7 times with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtracting 504 from 507 leaves us with 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 72

On to step 4:
39 divided by 72 is 0 with a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 70.0
Subtract 0 from 39 to get 39.
Include the next digit (1) from the dividend after 39, then repeat: 391 / 72

Going ahead to step 5:
391 divided by 72 is 5 with a remainder of 31.
The next digit of our result is 5. 
Result so far: 705.0
Subtracting 360 from 391 leaves us with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

On to step 6:
72 goes into 310 4 times with a remainder of 22.
The next digit of our result is 4. 
Result so far: 705.4
Subtract 288 from 310 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 7:
The number 72 fits into 220 3 times, leaving a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 705.43
Subtracting 216 from 220 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 8:
40 divided by 72 is 0 with a remainder of 40.
The next digit of our result is 0. 
Result so far: 705.43
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 9:
If we divide 400 by 72, we get 5 and a remainder of 40.
The next digit of our result is 5. 
Result so far: 705.4305
Subtracting 360 from 400 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 10:
72 can be fit into 400 5 times, resulting in a remainder of 40.
The number 5 becomes the next digit in our result. 
Result so far: 705.43055
The remainder is 40 after subtracting 360 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

After the division, we end up with 705.43055 and a remainder of 4e-05.