We look at the division of 131775 by 72 
The aim is to understand the frequency of 72 in 131775.

On to step 1:
When dividing 1 by 72, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 72

Moving on to step 2:
When dividing 13 by 72, we get 0 with a remainder of 13.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 13, we end up with 13.
Bring next digit (1) of the dividend behind the 13 and repeat the process: 131 / 72

Advancing to step 3:
If we divide 131 by 72, we get 1 and a remainder of 59.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 72 from 131 and we're left with 59.
Grab the next digit (7) from the dividend, add it to 59, then carry on: 597 / 72

Step 4:
72 can be fit into 597 8 times, resulting in a remainder of 21.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
Subtract 576 from 597 to get 21.
Bring next digit (7) of the dividend behind the 21 and repeat the process: 217 / 72

Going ahead to step 5:
If we divide 217 by 72, we get 3 and a remainder of 1.
The next digit of our result is 3. 
Result so far: 183.0
The remainder is 1 after subtracting 216 from 217.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 72

Advancing to step 6:
72 can be fit into 15 0 times, resulting in a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 1830.0
Subtracting 0 from 15 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.

Going ahead to step 7:
If we divide 150 by 72, we get 2 and a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 1830.2
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.

Moving on to step 8:
The number 72 fits into 60 0 times, leaving a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 1830.2
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.

On to step 9:
If we divide 600 by 72, we get 8 and a remainder of 24.
The next digit of our result is 8. 
Result so far: 1830.208
The remainder is 24 after subtracting 576 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 10:
If we divide 240 by 72, we get 3 and a remainder of 24.
The number 3 becomes the next digit in our result. 
Result so far: 1830.2083
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.

Let's proceed to step 11:
240 divided by 72 is 3 with a remainder of 24.
The number 3 becomes the next digit in our result. 
Result so far: 1830.20833
If we subtract 216 from 240, we 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.

The final result is 1830.20833 with a remainder of 2.4e-05.