We're dividing 573534 by 15 
The aim is to understand the frequency of 15 in 573534.

Let's proceed to step 1:
15 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Grab the next digit (7) from the dividend, add it to 5, then carry on: 57 / 15

Going ahead to step 2:
15 can be fit into 57 3 times, resulting in a remainder of 12.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
The remainder is 12 after subtracting 45 from 57.
Append the next digit (3) from the dividend to 12 and continue with: 123 / 15

Step 3:
If we divide 123 by 15, we get 8 and a remainder of 3.
Write down 8 as next digit of the result. 
Result so far: 38.0
The remainder is 3 after subtracting 120 from 123.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 15

Advancing to step 4:
15 goes into 35 2 times with a remainder of 5.
Use 2 as the next digit of our solution. 
Result so far: 382.0
If we subtract 30 from 35, we get 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 15

On to step 5:
When dividing 53 by 15, we get 3 with a remainder of 8.
Record the quotient 3 as the next digit in the result. 
Result so far: 3823.0
If we take 45 away from 53, we end up with 8.
Grab the next digit (4) from the dividend, add it to 8, then carry on: 84 / 15

Let's proceed to step 6:
84 divided by 15 is 5 with a remainder of 9.
Write down 5 as next digit of the result. 
Result so far: 38235.0
If we take 75 away from 84, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 7:
If we divide 90 by 15, we get 6 and a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 38235.6
If we take 90 away from 90, 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.

Let's proceed to step 8:
The number 15 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 38235.6
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.

Moving on to step 9:
15 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 38235.6
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.

The final outcome is 38235.6, with a leftover of 0.0.