Let's divide 640579 by 30
The aim is to understand the frequency of 30 in 640579.

Let's proceed to 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
If we subtract 0 from 6, we get 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 30

Advancing to step 2:
30 goes into 64 2 times with a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 60 from 64 to get 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 30

Let's proceed to step 3:
The number 30 fits into 40 1 times, leaving a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 21.0
The remainder is 10 after subtracting 30 from 40.
Append the next digit (5) from the dividend to 10 and continue with: 105 / 30

Step 4:
105 divided by 30 is 3 with a remainder of 15.
The next digit of our result is 3. 
Result so far: 213.0
If we subtract 90 from 105, we get 15.
Grab the next digit (7) from the dividend, add it to 15, then carry on: 157 / 30

On to step 5:
30 goes into 157 5 times with a remainder of 7.
Put 5 as the next digit of the answer. 
Result so far: 2135.0
If we take 150 away from 157, we end up with 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 30

Going ahead to step 6:
The number 30 fits into 79 2 times, leaving a remainder of 19.
The number 2 becomes the next digit in our result. 
Result so far: 21352.0
If we take 60 away from 79, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 7:
190 divided by 30 is 6 with a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 21352.6
Subtract 180 from 190 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
If we divide 100 by 30, we get 3 and a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 21352.63
Subtracting 90 from 100 leaves us 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:
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: 21352.633
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.

Our division results in 21352.633 with a remaining 0.001.