45553 ÷ 15 
The aim is to understand the frequency of 15 in 45553.

Moving on to step 1:
4 divided by 15 is 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 15

Let's proceed to step 2:
45 divided by 15 is 3 with a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
The remainder is 0 after subtracting 45 from 45.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 15

Going ahead to step 3:
15 can be fit into 5 0 times, resulting in a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 30.0
Subtract 0 from 5 to get 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 15

Let's proceed to step 4:
55 divided by 15 is 3 with a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 303.0
If we subtract 45 from 55, we get 10.
Include the next digit (3) from the dividend after 10, then repeat: 103 / 15

Going ahead to step 5:
When dividing 103 by 15, we get 6 with a remainder of 13.
Put 6 as the next digit of the answer. 
Result so far: 3036.0
Deduct 90 from 103 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 6:
The number 15 fits into 130 8 times, leaving a remainder of 10.
Use 8 as the next digit of our solution. 
Result so far: 3036.8
If we subtract 120 from 130, 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.

Moving on to step 7:
The number 15 fits into 100 6 times, leaving a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 3036.86
Subtracting 90 from 100 leaves us 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.

On to step 8:
The number 15 fits into 100 6 times, leaving a remainder of 10.
The next digit of our result is 6. 
Result so far: 3036.866
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.

Our division results in 3036.866 with a remaining 0.001.