572033 divided by 21 
The aim is to understand the frequency of 21 in 572033.

Advancing to step 1:
21 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Include the next digit (7) from the dividend after 5, then repeat: 57 / 21

Step 2:
The number 21 fits into 57 2 times, leaving a remainder of 15.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 42 from 57 leaves us with 15.
Bring next digit (2) of the dividend behind the 15 and repeat the process: 152 / 21

Moving on to step 3:
The number 21 fits into 152 7 times, leaving a remainder of 5.
Use 7 as the next digit of our solution. 
Result so far: 27.0
Subtract 147 from 152 to get 5.
Take the next digit (0) from the dividend and append it to 5, then repeat: 50 / 21

On to step 4:
The number 21 fits into 50 2 times, leaving a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 272.0
If we subtract 42 from 50, we get 8.
Fetch the next digit (3) from the dividend, attach it to 8 and continue: 83 / 21

Going ahead to step 5:
The number 21 fits into 83 3 times, leaving a remainder of 20.
Write down 3 as next digit of the result. 
Result so far: 2723.0
If we take 63 away from 83, we end up with 20.
Fetch the next digit (3) from the dividend, attach it to 20 and continue: 203 / 21

On to step 6:
203 divided by 21 is 9 with a remainder of 14.
Use 9 as the next digit of our solution. 
Result so far: 27239.0
Deduct 189 from 203 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 7:
140 divided by 21 is 6 with a remainder of 14.
Write down 6 as next digit of the result. 
Result so far: 27239.6
Subtracting 126 from 140 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 8:
If we divide 140 by 21, we get 6 and a remainder of 14.
The number 6 becomes the next digit in our result. 
Result so far: 27239.66
If we take 126 away from 140, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Our division results in 27239.66 with a remaining 0.014.