Let's divide 335658 by 15
The aim is to understand the frequency of 15 in 335658.

Going ahead to step 1:
3 divided by 15 is 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (3) from the dividend and append it to 3, then repeat: 33 / 15

Advancing to step 2:
15 can be fit into 33 2 times, resulting in a remainder of 3.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 30 from 33 leaves us with 3.
Take the next digit (5) from the dividend and append it to 3, then repeat: 35 / 15

Moving on to step 3:
35 divided by 15 is 2 with a remainder of 5.
The number 2 becomes the next digit in our result. 
Result so far: 22.0
If we subtract 30 from 35, we get 5.
Grab the next digit (6) from the dividend, add it to 5, then carry on: 56 / 15

On to step 4:
15 goes into 56 3 times with a remainder of 11.
Use 3 as the next digit of our solution. 
Result so far: 223.0
The remainder is 11 after subtracting 45 from 56.
Include the next digit (5) from the dividend after 11, then repeat: 115 / 15

Going ahead to step 5:
If we divide 115 by 15, we get 7 and a remainder of 10.
The next digit of our result is 7. 
Result so far: 2237.0
Subtracting 105 from 115 leaves us with 10.
Fetch the next digit (8) from the dividend, attach it to 10 and continue: 108 / 15

Let's proceed to step 6:
15 goes into 108 7 times with a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 22377.0
The remainder is 3 after subtracting 105 from 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 7:
15 goes into 30 2 times with a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 22377.2
Subtracting 30 from 30 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.

Moving on to step 8:
15 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 22377.2
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.

Step 9:
If we divide 0 by 15, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 22377.2
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.

Our division results in 22377.2 with a remaining 0.0.