We're dividing 729623 by 31 
The aim is to understand the frequency of 31 in 729623.

Let's proceed to step 1:
7 divided by 31 is 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 31

On to step 2:
When dividing 72 by 31, we get 2 with a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 2.0
The remainder is 10 after subtracting 62 from 72.
Take the next digit (9) from the dividend and append it to 10, then repeat: 109 / 31

Advancing to step 3:
The number 31 fits into 109 3 times, leaving a remainder of 16.
The next digit of our result is 3. 
Result so far: 23.0
Subtract 93 from 109 to get 16.
Grab the next digit (6) from the dividend, add it to 16, then carry on: 166 / 31

Moving on to step 4:
31 goes into 166 5 times with a remainder of 11.
The number 5 becomes the next digit in our result. 
Result so far: 235.0
If we take 155 away from 166, we end up with 11.
Include the next digit (2) from the dividend after 11, then repeat: 112 / 31

Going ahead to step 5:
If we divide 112 by 31, we get 3 and a remainder of 19.
Use 3 as the next digit of our solution. 
Result so far: 2353.0
Deduct 93 from 112 and we're left with 19.
Append the next digit (3) from the dividend to 19 and continue with: 193 / 31

Going ahead to step 6:
The number 31 fits into 193 6 times, leaving a remainder of 7.
Record the quotient 6 as the next digit in the result. 
Result so far: 23536.0
If we subtract 186 from 193, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 7:
When dividing 70 by 31, we get 2 with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 23536.2
If we subtract 62 from 70, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 8:
If we divide 80 by 31, we get 2 and a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 23536.22
The remainder is 18 after subtracting 62 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

The final outcome is 23536.22, with a leftover of 0.018.