We look at the division of 644830 by 30 
The aim is to understand the frequency of 30 in 644830.

Advancing to step 1:
If we divide 6 by 30, we get 0 and 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 (4) from the dividend, attach it to 6 and continue: 64 / 30

Let's proceed to step 2:
64 divided by 30 is 2 with a remainder of 4.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 4 after subtracting 60 from 64.
Fetch the next digit (4) from the dividend, attach it to 4 and continue: 44 / 30

Step 3:
30 can be fit into 44 1 times, resulting in a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 21.0
Deduct 30 from 44 and we're left with 14.
Fetch the next digit (8) from the dividend, attach it to 14 and continue: 148 / 30

Going ahead to step 4:
If we divide 148 by 30, we get 4 and a remainder of 28.
Write down 4 as next digit of the result. 
Result so far: 214.0
If we subtract 120 from 148, we get 28.
Take the next digit (3) from the dividend and append it to 28, then repeat: 283 / 30

Moving on to step 5:
30 goes into 283 9 times with a remainder of 13.
The next digit of our result is 9. 
Result so far: 2149.0
The remainder is 13 after subtracting 270 from 283.
Append the next digit (0) from the dividend to 13 and continue with: 130 / 30

Let's proceed to step 6:
The number 30 fits into 130 4 times, leaving a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 21494.0
Deduct 120 from 130 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.

Moving on to step 7:
The number 30 fits into 100 3 times, leaving a remainder of 10.
The number 3 becomes the next digit in our result. 
Result so far: 21494.3
If we take 90 away from 100, 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:
If we divide 100 by 30, we get 3 and a remainder of 10.
Use 3 as the next digit of our solution. 
Result so far: 21494.33
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.

After the division, we end up with 21494.33 and a remainder of 0.01.