We're dividing 831509 by 30 
The aim is to understand the frequency of 30 in 831509.

Advancing to step 1:
If we divide 8 by 30, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (3) from the dividend, attach it to 8 and continue: 83 / 30

Step 2:
83 divided by 30 is 2 with a remainder of 23.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtracting 60 from 83 leaves us with 23.
Take the next digit (1) from the dividend and append it to 23, then repeat: 231 / 30

Moving on to step 3:
The number 30 fits into 231 7 times, leaving a remainder of 21.
Put 7 as the next digit of the answer. 
Result so far: 27.0
The remainder is 21 after subtracting 210 from 231.
Bring next digit (5) of the dividend behind the 21 and repeat the process: 215 / 30

Let's proceed to step 4:
30 goes into 215 7 times with a remainder of 5.
Record the quotient 7 as the next digit in the result. 
Result so far: 277.0
Deduct 210 from 215 and we're left with 5.
Fetch the next digit (0) from the dividend, attach it to 5 and continue: 50 / 30

Advancing to step 5:
30 goes into 50 1 times with a remainder of 20.
Put 1 as the next digit of the answer. 
Result so far: 2771.0
Subtract 30 from 50 to get 20.
Fetch the next digit (9) from the dividend, attach it to 20 and continue: 209 / 30

On to step 6:
30 goes into 209 6 times with a remainder of 29.
Use 6 as the next digit of our solution. 
Result so far: 27716.0
If we take 180 away from 209, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 7:
If we divide 290 by 30, we get 9 and a remainder of 20.
Record the quotient 9 as the next digit in the result. 
Result so far: 27716.9
Subtract 270 from 290 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.

Let's proceed to step 8:
If we divide 200 by 30, we get 6 and a remainder of 20.
Write down 6 as next digit of the result. 
Result so far: 27716.96
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.

Advancing to step 9:
The number 30 fits into 200 6 times, leaving a remainder of 20.
The next digit of our result is 6. 
Result so far: 27716.966
If we subtract 180 from 200, we 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.

Our division results in 27716.966 with a remaining 0.002.