727191 divided by 31 
The aim is to understand the frequency of 31 in 727191.

On to step 1:
When dividing 7 by 31, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 31

Advancing to step 2:
72 divided by 31 is 2 with a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 62 from 72 to get 10.
Bring next digit (7) of the dividend behind the 10 and repeat the process: 107 / 31

Advancing to step 3:
When dividing 107 by 31, we get 3 with a remainder of 14.
The next digit of our result is 3. 
Result so far: 23.0
Deduct 93 from 107 and we're left with 14.
Include the next digit (1) from the dividend after 14, then repeat: 141 / 31

On to step 4:
31 can be fit into 141 4 times, resulting in a remainder of 17.
Put 4 as the next digit of the answer. 
Result so far: 234.0
The remainder is 17 after subtracting 124 from 141.
Include the next digit (9) from the dividend after 17, then repeat: 179 / 31

Step 5:
31 goes into 179 5 times with a remainder of 24.
Write down 5 as next digit of the result. 
Result so far: 2345.0
Deduct 155 from 179 and we're left with 24.
Take the next digit (1) from the dividend and append it to 24, then repeat: 241 / 31

Moving on to step 6:
The number 31 fits into 241 7 times, leaving a remainder of 24.
Write down 7 as next digit of the result. 
Result so far: 23457.0
Deduct 217 from 241 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 7:
240 divided by 31 is 7 with a remainder of 23.
Use 7 as the next digit of our solution. 
Result so far: 23457.7
If we take 217 away from 240, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 8:
230 divided by 31 is 7 with a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 23457.77
If we subtract 217 from 230, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

The final result is 23457.77 with a remainder of 0.013.