We look at the division of 523617 by 72 
The aim is to understand the frequency of 72 in 523617.

On to step 1:
72 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Include the next digit (2) from the dividend after 5, then repeat: 52 / 72

Moving on to step 2:
52 divided by 72 is 0 with a remainder of 52.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 52 leaves us with 52.
Include the next digit (3) from the dividend after 52, then repeat: 523 / 72

Let's proceed to step 3:
72 can be fit into 523 7 times, resulting in a remainder of 19.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtracting 504 from 523 leaves us with 19.
Bring next digit (6) of the dividend behind the 19 and repeat the process: 196 / 72

On to step 4:
When dividing 196 by 72, we get 2 with a remainder of 52.
Record the quotient 2 as the next digit in the result. 
Result so far: 72.0
Subtract 144 from 196 to get 52.
Append the next digit (1) from the dividend to 52 and continue with: 521 / 72

On to step 5:
If we divide 521 by 72, we get 7 and a remainder of 17.
The number 7 becomes the next digit in our result. 
Result so far: 727.0
If we subtract 504 from 521, we get 17.
Grab the next digit (7) from the dividend, add it to 17, then carry on: 177 / 72

On to step 6:
177 divided by 72 is 2 with a remainder of 33.
The next digit of our result is 2. 
Result so far: 7272.0
The remainder is 33 after subtracting 144 from 177.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

On to step 7:
72 goes into 330 4 times with a remainder of 42.
Use 4 as the next digit of our solution. 
Result so far: 7272.4
Deduct 288 from 330 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 8:
420 divided by 72 is 5 with a remainder of 60.
Put 5 as the next digit of the answer. 
Result so far: 7272.45
The remainder is 60 after subtracting 360 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 9:
600 divided by 72 is 8 with a remainder of 24.
Put 8 as the next digit of the answer. 
Result so far: 7272.458
The remainder is 24 after subtracting 576 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 10:
When dividing 240 by 72, we get 3 with a remainder of 24.
Record the quotient 3 as the next digit in the result. 
Result so far: 7272.4583
Subtract 216 from 240 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 11:
72 goes into 240 3 times with a remainder of 24.
Write down 3 as next digit of the result. 
Result so far: 7272.45833
Subtracting 216 from 240 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

In conclusion, the division gives 7272.45833 with a balance of 2.4e-05.