We look at the division of 109991 by 72 
The aim is to understand the frequency of 72 in 109991.

Advancing to step 1:
When dividing 1 by 72, we get 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 72

Let's proceed to step 2:
10 divided by 72 is 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 10 and we're left with 10.
Bring next digit (9) of the dividend behind the 10 and repeat the process: 109 / 72

Going ahead to step 3:
72 goes into 109 1 times with a remainder of 37.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 72 from 109 leaves us with 37.
Append the next digit (9) from the dividend to 37 and continue with: 379 / 72

Let's proceed to step 4:
The number 72 fits into 379 5 times, leaving a remainder of 19.
Write down 5 as next digit of the result. 
Result so far: 15.0
Deduct 360 from 379 and we're left with 19.
Bring next digit (9) of the dividend behind the 19 and repeat the process: 199 / 72

Advancing to step 5:
If we divide 199 by 72, we get 2 and a remainder of 55.
Use 2 as the next digit of our solution. 
Result so far: 152.0
The remainder is 55 after subtracting 144 from 199.
Include the next digit (1) from the dividend after 55, then repeat: 551 / 72

Let's proceed to step 6:
The number 72 fits into 551 7 times, leaving a remainder of 47.
Write down 7 as next digit of the result. 
Result so far: 1527.0
The remainder is 47 after subtracting 504 from 551.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 7:
The number 72 fits into 470 6 times, leaving a remainder of 38.
The number 6 becomes the next digit in our result. 
Result so far: 1527.6
If we take 432 away from 470, we end up 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.

Advancing to step 8:
If we divide 380 by 72, we get 5 and a remainder of 20.
The next digit of our result is 5. 
Result so far: 1527.65
If we take 360 away from 380, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 9:
72 can be fit into 200 2 times, resulting in a remainder of 56.
Record the quotient 2 as the next digit in the result. 
Result so far: 1527.652
Subtract 144 from 200 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.

Advancing to step 10:
When dividing 560 by 72, we get 7 with a remainder of 56.
Record the quotient 7 as the next digit in the result. 
Result so far: 1527.6527
Deduct 504 from 560 and we're left 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.

Step 11:
If we divide 560 by 72, we get 7 and a remainder of 56.
The number 7 becomes the next digit in our result. 
Result so far: 1527.65277
The remainder is 56 after subtracting 504 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

In conclusion, the division gives 1527.65277 with a balance of 5.6e-05.