We look at the division of 571655 by 72 
The aim is to understand the frequency of 72 in 571655.

Going ahead to step 1:
If we divide 5 by 72, we get 0 and a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Take the next digit (7) from the dividend and append it to 5, then repeat: 57 / 72

Step 2:
57 divided by 72 is 0 with a remainder of 57.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 57 to get 57.
Grab the next digit (1) from the dividend, add it to 57, then carry on: 571 / 72

Advancing to step 3:
The number 72 fits into 571 7 times, leaving a remainder of 67.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtract 504 from 571 to get 67.
Include the next digit (6) from the dividend after 67, then repeat: 676 / 72

On to step 4:
676 divided by 72 is 9 with a remainder of 28.
The next digit of our result is 9. 
Result so far: 79.0
If we subtract 648 from 676, we get 28.
Append the next digit (5) from the dividend to 28 and continue with: 285 / 72

On to step 5:
The number 72 fits into 285 3 times, leaving a remainder of 69.
The next digit of our result is 3. 
Result so far: 793.0
Subtracting 216 from 285 leaves us with 69.
Bring next digit (5) of the dividend behind the 69 and repeat the process: 695 / 72

Going ahead to step 6:
72 can be fit into 695 9 times, resulting in a remainder of 47.
Use 9 as the next digit of our solution. 
Result so far: 7939.0
Subtract 648 from 695 to get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

On to step 7:
The number 72 fits into 470 6 times, leaving a remainder of 38.
Write down 6 as next digit of the result. 
Result so far: 7939.6
Subtracting 432 from 470 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 8:
72 can be fit into 380 5 times, resulting in a remainder of 20.
The next digit of our result is 5. 
Result so far: 7939.65
If we subtract 360 from 380, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 9:
200 divided by 72 is 2 with a remainder of 56.
Record the quotient 2 as the next digit in the result. 
Result so far: 7939.652
If we subtract 144 from 200, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 10:
If we divide 560 by 72, we get 7 and a remainder of 56.
Write down 7 as next digit of the result. 
Result so far: 7939.6527
Subtract 504 from 560 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 11:
The number 72 fits into 560 7 times, leaving a remainder of 56.
The next digit of our result is 7. 
Result so far: 7939.65277
If we take 504 away from 560, we end up with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

After the division, we end up with 7939.65277 and a remainder of 5.6e-05.