We divide 252372 by 9
The aim is to understand the frequency of 9 in 252372.

Step 1:
If we divide 2 by 9, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 9

Moving on to step 2:
When dividing 25 by 9, we get 2 with a remainder of 7.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 18 from 25 leaves us with 7.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 9

Moving on to step 3:
9 goes into 72 8 times with a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 28.0
Deduct 72 from 72 and we're left with 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 9

Step 4:
When dividing 3 by 9, we get 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 280.0
The remainder is 3 after subtracting 0 from 3.
Fetch the next digit (7) from the dividend, attach it to 3 and continue: 37 / 9

On to step 5:
The number 9 fits into 37 4 times, leaving a remainder of 1.
The next digit of our result is 4. 
Result so far: 2804.0
Subtracting 36 from 37 leaves us with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 9

Let's proceed to step 6:
9 goes into 12 1 times with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 28041.0
The remainder is 3 after subtracting 9 from 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 7:
30 divided by 9 is 3 with a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 28041.3
Subtracting 27 from 30 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 8:
30 divided by 9 is 3 with a remainder of 3.
The next digit of our result is 3. 
Result so far: 28041.33
Subtract 27 from 30 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

The final outcome is 28041.33, with a leftover of 0.003.