We're dividing 813349 by 15 
The aim is to understand the frequency of 15 in 813349.

Moving on to step 1:
The number 15 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 15

Step 2:
If we divide 81 by 15, we get 5 and a remainder of 6.
The next digit of our result is 5. 
Result so far: 5.0
Deduct 75 from 81 and we're left with 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 15

Going ahead to step 3:
15 can be fit into 63 4 times, resulting in a remainder of 3.
The next digit of our result is 4. 
Result so far: 54.0
If we take 60 away from 63, we end up with 3.
Bring next digit (3) of the dividend behind the 3 and repeat the process: 33 / 15

On to step 4:
The number 15 fits into 33 2 times, leaving a remainder of 3.
Put 2 as the next digit of the answer. 
Result so far: 542.0
Subtract 30 from 33 to get 3.
Fetch the next digit (4) from the dividend, attach it to 3 and continue: 34 / 15

Let's proceed to step 5:
When dividing 34 by 15, we get 2 with a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 5422.0
If we subtract 30 from 34, we get 4.
Bring next digit (9) of the dividend behind the 4 and repeat the process: 49 / 15

Let's proceed to step 6:
15 can be fit into 49 3 times, resulting in a remainder of 4.
The next digit of our result is 3. 
Result so far: 54223.0
If we take 45 away from 49, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 7:
When dividing 40 by 15, we get 2 with a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 54223.2
If we take 30 away from 40, we end up 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.

Step 8:
15 goes into 100 6 times with a remainder of 10.
Put 6 as the next digit of the answer. 
Result so far: 54223.26
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.

Advancing to step 9:
100 divided by 15 is 6 with a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 54223.266
If we subtract 90 from 100, 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.

The quotient of the division is 54223.266, and the remainder is 0.001.