664864 ÷ 30 
The aim is to understand the frequency of 30 in 664864.

Step 1:
The number 30 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 30

Let's proceed to step 2:
When dividing 66 by 30, we get 2 with a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 60 from 66 leaves us with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 30

Step 3:
The number 30 fits into 64 2 times, leaving a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 22.0
If we subtract 60 from 64, we get 4.
Fetch the next digit (8) from the dividend, attach it to 4 and continue: 48 / 30

Step 4:
When dividing 48 by 30, we get 1 with a remainder of 18.
Record the quotient 1 as the next digit in the result. 
Result so far: 221.0
The remainder is 18 after subtracting 30 from 48.
Grab the next digit (6) from the dividend, add it to 18, then carry on: 186 / 30

Step 5:
If we divide 186 by 30, we get 6 and a remainder of 6.
Put 6 as the next digit of the answer. 
Result so far: 2216.0
Subtract 180 from 186 to get 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 30

On to step 6:
64 divided by 30 is 2 with a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 22162.0
Subtracting 60 from 64 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 7:
30 goes into 40 1 times with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 22162.1
If we take 30 away from 40, we end up 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:
30 goes into 100 3 times with a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 22162.13
Deduct 90 from 100 and we're left 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.

Let's proceed to step 9:
The number 30 fits into 100 3 times, leaving a remainder of 10.
Write down 3 as next digit of the result. 
Result so far: 22162.133
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 22162.133 with a remainder of 0.001.