666323 ÷ 30 
The aim is to understand the frequency of 30 in 666323.

On to step 1:
30 goes into 6 0 times with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 30

Advancing to step 2:
66 divided by 30 is 2 with a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 60 away from 66, we end up with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 30

Going ahead to step 3:
30 can be fit into 66 2 times, resulting in a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 22.0
The remainder is 6 after subtracting 60 from 66.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 30

Going ahead to step 4:
30 goes into 63 2 times with a remainder of 3.
The next digit of our result is 2. 
Result so far: 222.0
The remainder is 3 after subtracting 60 from 63.
Bring next digit (2) of the dividend behind the 3 and repeat the process: 32 / 30

Going ahead to step 5:
32 divided by 30 is 1 with a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 2221.0
Deduct 30 from 32 and we're left with 2.
Fetch the next digit (3) from the dividend, attach it to 2 and continue: 23 / 30

Advancing to step 6:
The number 30 fits into 23 0 times, leaving a remainder of 23.
The next digit of our result is 0. 
Result so far: 22210.0
Subtracting 0 from 23 leaves us with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Moving on to step 7:
30 can be fit into 230 7 times, resulting in a remainder of 20.
The next digit of our result is 7. 
Result so far: 22210.7
Subtract 210 from 230 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 8:
200 divided by 30 is 6 with a remainder of 20.
Use 6 as the next digit of our solution. 
Result so far: 22210.76
Deduct 180 from 200 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 9:
If we divide 200 by 30, we get 6 and a remainder of 20.
The next digit of our result is 6. 
Result so far: 22210.766
The remainder is 20 after subtracting 180 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final outcome is 22210.766, with a leftover of 0.002.