We look at the division of 128771 by 72 
The aim is to understand the frequency of 72 in 128771.

Moving on to step 1:
When dividing 1 by 72, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 72

Advancing to step 2:
72 goes into 12 0 times with a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Include the next digit (8) from the dividend after 12, then repeat: 128 / 72

Advancing to step 3:
When dividing 128 by 72, we get 1 with a remainder of 56.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 72 from 128 leaves us with 56.
Include the next digit (7) from the dividend after 56, then repeat: 567 / 72

Going ahead to step 4:
The number 72 fits into 567 7 times, leaving a remainder of 63.
Put 7 as the next digit of the answer. 
Result so far: 17.0
Subtracting 504 from 567 leaves us with 63.
Take the next digit (7) from the dividend and append it to 63, then repeat: 637 / 72

On to step 5:
The number 72 fits into 637 8 times, leaving a remainder of 61.
Write down 8 as next digit of the result. 
Result so far: 178.0
Subtracting 576 from 637 leaves us with 61.
Include the next digit (1) from the dividend after 61, then repeat: 611 / 72

Moving on to step 6:
72 goes into 611 8 times with a remainder of 35.
The number 8 becomes the next digit in our result. 
Result so far: 1788.0
Subtract 576 from 611 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 7:
When dividing 350 by 72, we get 4 with a remainder of 62.
Use 4 as the next digit of our solution. 
Result so far: 1788.4
If we take 288 away from 350, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Step 8:
When dividing 620 by 72, we get 8 with a remainder of 44.
The number 8 becomes the next digit in our result. 
Result so far: 1788.48
Deduct 576 from 620 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

On to step 9:
If we divide 440 by 72, we get 6 and a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 1788.486
Deduct 432 from 440 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 10:
When dividing 80 by 72, we get 1 with a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 1788.4861
Subtracting 72 from 80 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 11:
72 goes into 80 1 times with a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 1788.48611
Subtracting 72 from 80 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

After the division, we end up with 1788.48611 and a remainder of 8e-06.