We look at the division of 446166 by 15 
The aim is to understand the frequency of 15 in 446166.

Advancing to step 1:
4 divided by 15 is 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Include the next digit (4) from the dividend after 4, then repeat: 44 / 15

Let's proceed to step 2:
15 goes into 44 2 times with a remainder of 14.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 30 from 44 and we're left with 14.
Bring next digit (6) of the dividend behind the 14 and repeat the process: 146 / 15

Moving on to step 3:
146 divided by 15 is 9 with a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 29.0
Subtract 135 from 146 to get 11.
Append the next digit (1) from the dividend to 11 and continue with: 111 / 15

Moving on to step 4:
111 divided by 15 is 7 with a remainder of 6.
Put 7 as the next digit of the answer. 
Result so far: 297.0
Subtracting 105 from 111 leaves us with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 15

On to step 5:
15 can be fit into 66 4 times, resulting in a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 2974.0
If we subtract 60 from 66, we get 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 15

Moving on to step 6:
66 divided by 15 is 4 with a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 29744.0
Deduct 60 from 66 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 7:
When dividing 60 by 15, we get 4 with a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 29744.4
Deduct 60 from 60 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
0 divided by 15 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 29744.4
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
15 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 29744.4
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 29744.4, with a leftover of 0.0.