448910 ÷ 15 
The aim is to understand the frequency of 15 in 448910.

Going ahead to step 1:
15 can be fit into 4 0 times, resulting in a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Grab the next digit (4) from the dividend, add it to 4, then carry on: 44 / 15

Going ahead to step 2:
The number 15 fits into 44 2 times, leaving a remainder of 14.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we subtract 30 from 44, we get 14.
Grab the next digit (8) from the dividend, add it to 14, then carry on: 148 / 15

Going ahead to step 3:
148 divided by 15 is 9 with a remainder of 13.
The next digit of our result is 9. 
Result so far: 29.0
Subtracting 135 from 148 leaves us with 13.
Take the next digit (9) from the dividend and append it to 13, then repeat: 139 / 15

Step 4:
139 divided by 15 is 9 with a remainder of 4.
The number 9 becomes the next digit in our result. 
Result so far: 299.0
The remainder is 4 after subtracting 135 from 139.
Bring next digit (1) of the dividend behind the 4 and repeat the process: 41 / 15

On to step 5:
41 divided by 15 is 2 with a remainder of 11.
Use 2 as the next digit of our solution. 
Result so far: 2992.0
Deduct 30 from 41 and we're left with 11.
Fetch the next digit (0) from the dividend, attach it to 11 and continue: 110 / 15

Let's proceed to step 6:
15 can be fit into 110 7 times, resulting in a remainder of 5.
Write down 7 as next digit of the result. 
Result so far: 29927.0
If we subtract 105 from 110, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 7:
If we divide 50 by 15, we get 3 and a remainder of 5.
Use 3 as the next digit of our solution. 
Result so far: 29927.3
The remainder is 5 after subtracting 45 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 8:
50 divided by 15 is 3 with a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 29927.33
If we take 45 away from 50, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final result is 29927.33 with a remainder of 0.005.