We look at the division of 635713 by 72 
The aim is to understand the frequency of 72 in 635713.

On to step 1:
6 divided by 72 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 72

Moving on to step 2:
When dividing 63 by 72, we get 0 with a remainder of 63.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 63 after subtracting 0 from 63.
Include the next digit (5) from the dividend after 63, then repeat: 635 / 72

On to step 3:
The number 72 fits into 635 8 times, leaving a remainder of 59.
Write down 8 as next digit of the result. 
Result so far: 8.0
If we subtract 576 from 635, we get 59.
Fetch the next digit (7) from the dividend, attach it to 59 and continue: 597 / 72

Moving on to step 4:
72 can be fit into 597 8 times, resulting in a remainder of 21.
Write down 8 as next digit of the result. 
Result so far: 88.0
The remainder is 21 after subtracting 576 from 597.
Append the next digit (1) from the dividend to 21 and continue with: 211 / 72

Moving on to step 5:
If we divide 211 by 72, we get 2 and a remainder of 67.
The number 2 becomes the next digit in our result. 
Result so far: 882.0
Deduct 144 from 211 and we're left with 67.
Bring next digit (3) of the dividend behind the 67 and repeat the process: 673 / 72

Moving on to step 6:
The number 72 fits into 673 9 times, leaving a remainder of 25.
Use 9 as the next digit of our solution. 
Result so far: 8829.0
Subtracting 648 from 673 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 7:
If we divide 250 by 72, we get 3 and a remainder of 34.
Use 3 as the next digit of our solution. 
Result so far: 8829.3
If we take 216 away from 250, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 8:
72 can be fit into 340 4 times, resulting in a remainder of 52.
Put 4 as the next digit of the answer. 
Result so far: 8829.34
Subtract 288 from 340 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 9:
If we divide 520 by 72, we get 7 and a remainder of 16.
Use 7 as the next digit of our solution. 
Result so far: 8829.347
Subtracting 504 from 520 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 10:
160 divided by 72 is 2 with a remainder of 16.
Put 2 as the next digit of the answer. 
Result so far: 8829.3472
Subtract 144 from 160 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 11:
The number 72 fits into 160 2 times, leaving a remainder of 16.
The next digit of our result is 2. 
Result so far: 8829.34722
If we take 144 away from 160, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final outcome is 8829.34722, with a leftover of 1.6e-05.