Let's divide 637647 by 72
The aim is to understand the frequency of 72 in 637647.

Going ahead to step 1:
6 divided by 72 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 72

Let's proceed to step 2:
63 divided by 72 is 0 with a remainder of 63.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 63 leaves us with 63.
Fetch the next digit (7) from the dividend, attach it to 63 and continue: 637 / 72

Let's proceed to step 3:
When dividing 637 by 72, we get 8 with a remainder of 61.
Put 8 as the next digit of the answer. 
Result so far: 8.0
If we take 576 away from 637, we end up with 61.
Take the next digit (6) from the dividend and append it to 61, then repeat: 616 / 72

Going ahead to step 4:
616 divided by 72 is 8 with a remainder of 40.
Use 8 as the next digit of our solution. 
Result so far: 88.0
Subtracting 576 from 616 leaves us with 40.
Take the next digit (4) from the dividend and append it to 40, then repeat: 404 / 72

Moving on to step 5:
When dividing 404 by 72, we get 5 with a remainder of 44.
The next digit of our result is 5. 
Result so far: 885.0
The remainder is 44 after subtracting 360 from 404.
Include the next digit (7) from the dividend after 44, then repeat: 447 / 72

On to step 6:
When dividing 447 by 72, we get 6 with a remainder of 15.
Put 6 as the next digit of the answer. 
Result so far: 8856.0
If we subtract 432 from 447, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 7:
72 can be fit into 150 2 times, resulting in a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 8856.2
The remainder is 6 after subtracting 144 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 8:
72 goes into 60 0 times with a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 8856.2
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

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: 8856.208
Deduct 576 from 600 and we're left 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.

On to step 10:
72 goes into 240 3 times with a remainder of 24.
Use 3 as the next digit of our solution. 
Result so far: 8856.2083
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.

Let's proceed to step 11:
The number 72 fits into 240 3 times, leaving a remainder of 24.
The next digit of our result is 3. 
Result so far: 8856.20833
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.

The final outcome is 8856.20833, with a leftover of 2.4e-05.