We look at the division of 441831 by 15 
The aim is to understand the frequency of 15 in 441831.

On to step 1:
The number 15 fits into 4 0 times, leaving a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Bring next digit (4) of the dividend behind the 4 and repeat the process: 44 / 15

Advancing 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.
Fetch the next digit (1) from the dividend, attach it to 14 and continue: 141 / 15

Going ahead to step 3:
The number 15 fits into 141 9 times, leaving a remainder of 6.
Use 9 as the next digit of our solution. 
Result so far: 29.0
Deduct 135 from 141 and we're left with 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 15

Advancing to step 4:
15 can be fit into 68 4 times, resulting in a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 294.0
Subtract 60 from 68 to get 8.
Grab the next digit (3) from the dividend, add it to 8, then carry on: 83 / 15

Advancing to step 5:
The number 15 fits into 83 5 times, leaving a remainder of 8.
The next digit of our result is 5. 
Result so far: 2945.0
Deduct 75 from 83 and we're left with 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 15

Step 6:
The number 15 fits into 81 5 times, leaving a remainder of 6.
The number 5 becomes the next digit in our result. 
Result so far: 29455.0
If we subtract 75 from 81, we get 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:
15 can be fit into 60 4 times, resulting in a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 29455.4
The remainder is 0 after subtracting 60 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
15 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 29455.4
If we subtract 0 from 0, we 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.

Let's proceed to step 9:
If we divide 0 by 15, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 29455.4
Subtracting 0 from 0 leaves us 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.

The quotient of the division is 29455.4, and the remainder is 0.0.