573222 ÷ 15 
The aim is to understand the frequency of 15 in 573222.

Moving on to step 1:
The number 15 fits into 5 0 times, leaving a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 15

Going ahead to step 2:
If we divide 57 by 15, we get 3 and a remainder of 12.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Deduct 45 from 57 and we're left with 12.
Fetch the next digit (3) from the dividend, attach it to 12 and continue: 123 / 15

On to step 3:
If we divide 123 by 15, we get 8 and a remainder of 3.
Use 8 as the next digit of our solution. 
Result so far: 38.0
If we subtract 120 from 123, we get 3.
Append the next digit (2) from the dividend to 3 and continue with: 32 / 15

Advancing to step 4:
If we divide 32 by 15, we get 2 and a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 382.0
Deduct 30 from 32 and we're left with 2.
Take the next digit (2) from the dividend and append it to 2, then repeat: 22 / 15

Let's proceed to step 5:
15 can be fit into 22 1 times, resulting in a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 3821.0
Subtract 15 from 22 to get 7.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 15

Step 6:
72 divided by 15 is 4 with a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 38214.0
Subtracting 60 from 72 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 7:
120 divided by 15 is 8 with a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 38214.8
If we take 120 away from 120, 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:
When dividing 0 by 15, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 38214.8
Subtract 0 from 0 to 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.

Going ahead to step 9:
If we divide 0 by 15, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 38214.8
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 38214.8, with a leftover of 0.0.