We look at the division of 143831 by 9 
The aim is to understand the frequency of 9 in 143831.

Going ahead to step 1:
1 divided by 9 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 9

Moving on to step 2:
14 divided by 9 is 1 with a remainder of 5.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 5 after subtracting 9 from 14.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 9

Let's proceed to step 3:
If we divide 53 by 9, we get 5 and a remainder of 8.
Put 5 as the next digit of the answer. 
Result so far: 15.0
Deduct 45 from 53 and we're left with 8.
Append the next digit (8) from the dividend to 8 and continue with: 88 / 9

Going ahead to step 4:
The number 9 fits into 88 9 times, leaving a remainder of 7.
The next digit of our result is 9. 
Result so far: 159.0
Subtract 81 from 88 to get 7.
Include the next digit (3) from the dividend after 7, then repeat: 73 / 9

Going ahead to step 5:
The number 9 fits into 73 8 times, leaving a remainder of 1.
The number 8 becomes the next digit in our result. 
Result so far: 1598.0
The remainder is 1 after subtracting 72 from 73.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 9

Going ahead to step 6:
9 can be fit into 11 1 times, resulting in a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 15981.0
The remainder is 2 after subtracting 9 from 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 7:
20 divided by 9 is 2 with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 15981.2
The remainder is 2 after subtracting 18 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 8:
When dividing 20 by 9, we get 2 with a remainder of 2.
The next digit of our result is 2. 
Result so far: 15981.22
If we take 18 away from 20, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

In conclusion, the division gives 15981.22 with a balance of 0.002.