We look at the division of 555935 by 15 
The aim is to understand the frequency of 15 in 555935.

Step 1:
5 divided by 15 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Take the next digit (5) from the dividend and append it to 5, then repeat: 55 / 15

Moving on to step 2:
When dividing 55 by 15, we get 3 with a remainder of 10.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtract 45 from 55 to get 10.
Take the next digit (5) from the dividend and append it to 10, then repeat: 105 / 15

Advancing to step 3:
15 can be fit into 105 7 times, resulting in a remainder of 0.
Use 7 as the next digit of our solution. 
Result so far: 37.0
Subtract 105 from 105 to get 0.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 15

Advancing to step 4:
The number 15 fits into 9 0 times, leaving a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 370.0
Deduct 0 from 9 and we're left with 9.
Include the next digit (3) from the dividend after 9, then repeat: 93 / 15

On to step 5:
The number 15 fits into 93 6 times, leaving a remainder of 3.
The next digit of our result is 6. 
Result so far: 3706.0
Deduct 90 from 93 and we're left with 3.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 15

Let's proceed to step 6:
15 can be fit into 35 2 times, resulting in a remainder of 5.
Record the quotient 2 as the next digit in the result. 
Result so far: 37062.0
Subtract 30 from 35 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.

On to step 7:
15 can be fit into 50 3 times, resulting in a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 37062.3
Deduct 45 from 50 and we're left 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.

Let's proceed to step 8:
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: 37062.33
If we take 45 away from 50, we end up 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.

The final outcome is 37062.33, with a leftover of 0.005.