We look at the division of 936353 by 15 
The aim is to understand the frequency of 15 in 936353.

Advancing to step 1:
When dividing 9 by 15, we get 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Grab the next digit (3) from the dividend, add it to 9, then carry on: 93 / 15

Going ahead to step 2:
When dividing 93 by 15, we get 6 with a remainder of 3.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtracting 90 from 93 leaves us with 3.
Fetch the next digit (6) from the dividend, attach it to 3 and continue: 36 / 15

Going ahead to step 3:
15 goes into 36 2 times with a remainder of 6.
Write down 2 as next digit of the result. 
Result so far: 62.0
If we take 30 away from 36, we end up with 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 15

Going ahead to step 4:
15 goes into 63 4 times with a remainder of 3.
Write down 4 as next digit of the result. 
Result so far: 624.0
Deduct 60 from 63 and we're left with 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 15

Advancing to step 5:
When dividing 35 by 15, we get 2 with a remainder of 5.
Write down 2 as next digit of the result. 
Result so far: 6242.0
Subtract 30 from 35 to get 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 15

Moving on to step 6:
15 can be fit into 53 3 times, resulting in a remainder of 8.
The next digit of our result is 3. 
Result so far: 62423.0
If we subtract 45 from 53, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 7:
15 can be fit into 80 5 times, resulting in a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 62423.5
If we subtract 75 from 80, 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 8:
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: 62423.53
Subtracting 45 from 50 leaves us 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.

Going ahead to step 9:
When dividing 50 by 15, we get 3 with a remainder of 5.
Use 3 as the next digit of our solution. 
Result so far: 62423.533
Subtract 45 from 50 to 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.

The quotient of the division is 62423.533, and the remainder is 0.0005.