We look at the division of 575583 by 72 
The aim is to understand the frequency of 72 in 575583.

Advancing to step 1:
The number 72 fits into 5 0 times, leaving a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Include the next digit (7) from the dividend after 5, then repeat: 57 / 72

Going ahead to step 2:
72 goes into 57 0 times with a remainder of 57.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 57 after subtracting 0 from 57.
Grab the next digit (5) from the dividend, add it to 57, then carry on: 575 / 72

Advancing to step 3:
The number 72 fits into 575 7 times, leaving a remainder of 71.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Deduct 504 from 575 and we're left with 71.
Grab the next digit (5) from the dividend, add it to 71, then carry on: 715 / 72

Let's proceed to step 4:
72 can be fit into 715 9 times, resulting in a remainder of 67.
Record the quotient 9 as the next digit in the result. 
Result so far: 79.0
Subtracting 648 from 715 leaves us with 67.
Bring next digit (8) of the dividend behind the 67 and repeat the process: 678 / 72

Advancing to step 5:
678 divided by 72 is 9 with a remainder of 30.
Use 9 as the next digit of our solution. 
Result so far: 799.0
Deduct 648 from 678 and we're left with 30.
Bring next digit (3) of the dividend behind the 30 and repeat the process: 303 / 72

On to step 6:
72 can be fit into 303 4 times, resulting in a remainder of 15.
Use 4 as the next digit of our solution. 
Result so far: 7994.0
Subtracting 288 from 303 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 7:
150 divided by 72 is 2 with a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 7994.2
If we take 144 away from 150, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 8:
60 divided by 72 is 0 with a remainder of 60.
The next digit of our result is 0. 
Result so far: 7994.2
The remainder is 60 after subtracting 0 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 9:
600 divided by 72 is 8 with a remainder of 24.
The next digit of our result is 8. 
Result so far: 7994.208
Subtract 576 from 600 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.

Let's proceed to step 10:
When dividing 240 by 72, we get 3 with a remainder of 24.
Write down 3 as next digit of the result. 
Result so far: 7994.2083
If we take 216 away from 240, we end up 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.

Moving on to step 11:
When dividing 240 by 72, we get 3 with a remainder of 24.
Write down 3 as next digit of the result. 
Result so far: 7994.20833
The remainder is 24 after subtracting 216 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

After the division, we end up with 7994.20833 and a remainder of 2.4e-05.