We look at the division of 91119 by 72 
The aim is to understand the frequency of 72 in 91119.

Step 1:
72 goes into 9 0 times with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 72

On to step 2:
When dividing 91 by 72, we get 1 with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 72 from 91 and we're left with 19.
Fetch the next digit (1) from the dividend, attach it to 19 and continue: 191 / 72

Step 3:
72 can be fit into 191 2 times, resulting in a remainder of 47.
Use 2 as the next digit of our solution. 
Result so far: 12.0
If we take 144 away from 191, we end up with 47.
Bring next digit (1) of the dividend behind the 47 and repeat the process: 471 / 72

Step 4:
If we divide 471 by 72, we get 6 and a remainder of 39.
Use 6 as the next digit of our solution. 
Result so far: 126.0
If we subtract 432 from 471, we get 39.
Fetch the next digit (9) from the dividend, attach it to 39 and continue: 399 / 72

Let's proceed to step 5:
The number 72 fits into 399 5 times, leaving a remainder of 39.
Record the quotient 5 as the next digit in the result. 
Result so far: 1265.0
Deduct 360 from 399 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

On to step 6:
If we divide 390 by 72, we get 5 and a remainder of 30.
Write down 5 as next digit of the result. 
Result so far: 1265.5
If we take 360 away from 390, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 7:
72 can be fit into 300 4 times, resulting in a remainder of 12.
Write down 4 as next digit of the result. 
Result so far: 1265.54
Deduct 288 from 300 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 8:
120 divided by 72 is 1 with a remainder of 48.
Record the quotient 1 as the next digit in the result. 
Result so far: 1265.541
If we take 72 away from 120, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 9:
480 divided by 72 is 6 with a remainder of 48.
Write down 6 as next digit of the result. 
Result so far: 1265.5416
If we subtract 432 from 480, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 10:
When dividing 480 by 72, we get 6 with a remainder of 48.
Write down 6 as next digit of the result. 
Result so far: 1265.54166
Deduct 432 from 480 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The final result is 1265.54166 with a remainder of 4.8e-05.