We divide 449128 by 15
The aim is to understand the frequency of 15 in 449128.

Moving on to step 1:
15 goes into 4 0 times with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Fetch the next digit (4) from the dividend, attach it to 4 and continue: 44 / 15

Let's proceed to step 2:
15 goes into 44 2 times with a remainder of 14.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 30 from 44 and we're left with 14.
Append the next digit (9) from the dividend to 14 and continue with: 149 / 15

Moving on to step 3:
The number 15 fits into 149 9 times, leaving a remainder of 14.
Use 9 as the next digit of our solution. 
Result so far: 29.0
The remainder is 14 after subtracting 135 from 149.
Grab the next digit (1) from the dividend, add it to 14, then carry on: 141 / 15

Step 4:
When dividing 141 by 15, we get 9 with a remainder of 6.
Use 9 as the next digit of our solution. 
Result so far: 299.0
The remainder is 6 after subtracting 135 from 141.
Grab the next digit (2) from the dividend, add it to 6, then carry on: 62 / 15

Going ahead to step 5:
62 divided by 15 is 4 with a remainder of 2.
The next digit of our result is 4. 
Result so far: 2994.0
Deduct 60 from 62 and we're left with 2.
Include the next digit (8) from the dividend after 2, then repeat: 28 / 15

Let's proceed to step 6:
If we divide 28 by 15, we get 1 and a remainder of 13.
Use 1 as the next digit of our solution. 
Result so far: 29941.0
If we subtract 15 from 28, 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.

Step 7:
15 goes into 130 8 times with a remainder of 10.
The number 8 becomes the next digit in our result. 
Result so far: 29941.8
If we subtract 120 from 130, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
The number 15 fits into 100 6 times, leaving a remainder of 10.
Put 6 as the next digit of the answer. 
Result so far: 29941.86
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 9:
100 divided by 15 is 6 with a remainder of 10.
The number 6 becomes the next digit in our result. 
Result so far: 29941.866
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 29941.866 with a remainder of 0.001.