545928 ÷ 15 
The aim is to understand the frequency of 15 in 545928.

Moving on to step 1:
If we divide 5 by 15, we get 0 and a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Take the next digit (4) from the dividend and append it to 5, then repeat: 54 / 15

Advancing to step 2:
The number 15 fits into 54 3 times, leaving a remainder of 9.
The next digit of our result is 3. 
Result so far: 3.0
Subtract 45 from 54 to get 9.
Take the next digit (5) from the dividend and append it to 9, then repeat: 95 / 15

Advancing to step 3:
When dividing 95 by 15, we get 6 with a remainder of 5.
Record the quotient 6 as the next digit in the result. 
Result so far: 36.0
If we take 90 away from 95, we end up with 5.
Bring next digit (9) of the dividend behind the 5 and repeat the process: 59 / 15

Let's proceed to step 4:
When dividing 59 by 15, we get 3 with a remainder of 14.
The next digit of our result is 3. 
Result so far: 363.0
The remainder is 14 after subtracting 45 from 59.
Grab the next digit (2) from the dividend, add it to 14, then carry on: 142 / 15

Advancing to step 5:
If we divide 142 by 15, we get 9 and a remainder of 7.
Use 9 as the next digit of our solution. 
Result so far: 3639.0
Subtract 135 from 142 to get 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 15

Going ahead to step 6:
15 can be fit into 78 5 times, resulting in a remainder of 3.
Use 5 as the next digit of our solution. 
Result so far: 36395.0
If we take 75 away from 78, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 7:
15 can be fit into 30 2 times, resulting in a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 36395.2
If we take 30 away from 30, we end up 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.
Use 0 as the next digit of our solution. 
Result so far: 36395.2
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
0 divided by 15 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 36395.2
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.

The final outcome is 36395.2, with a leftover of 0.0.