We divide 450415 by 9
The aim is to understand the frequency of 9 in 450415.

On to step 1:
4 divided by 9 is 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 9

On to step 2:
When dividing 45 by 9, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Subtract 45 from 45 to get 0.
Take the next digit (0) from the dividend and append it to 0, then repeat: 0 / 9

Let's proceed to step 3:
0 divided by 9 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 50.0
Subtracting 0 from 0 leaves us with 0.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 9

Let's proceed to step 4:
4 divided by 9 is 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 500.0
Subtracting 0 from 4 leaves us with 4.
Fetch the next digit (1) from the dividend, attach it to 4 and continue: 41 / 9

Let's proceed to step 5:
41 divided by 9 is 4 with a remainder of 5.
Write down 4 as next digit of the result. 
Result so far: 5004.0
If we subtract 36 from 41, we get 5.
Fetch the next digit (5) from the dividend, attach it to 5 and continue: 55 / 9

Moving on to step 6:
9 goes into 55 6 times with a remainder of 1.
The next digit of our result is 6. 
Result so far: 50046.0
If we take 54 away from 55, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
If we divide 10 by 9, we get 1 and a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 50046.1
If we subtract 9 from 10, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 8:
If we divide 10 by 9, we get 1 and a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 50046.11
If we take 9 away from 10, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final outcome is 50046.11, with a leftover of 0.001.