938309 ÷ 30 
The aim is to understand the frequency of 30 in 938309.

Going ahead to step 1:
When dividing 9 by 30, we get 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Fetch the next digit (3) from the dividend, attach it to 9 and continue: 93 / 30

Step 2:
30 can be fit into 93 3 times, resulting in a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
The remainder is 3 after subtracting 90 from 93.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 30

Let's proceed to step 3:
30 can be fit into 38 1 times, resulting in a remainder of 8.
Write down 1 as next digit of the result. 
Result so far: 31.0
Deduct 30 from 38 and we're left with 8.
Append the next digit (3) from the dividend to 8 and continue with: 83 / 30

Advancing to step 4:
30 can be fit into 83 2 times, resulting in a remainder of 23.
The next digit of our result is 2. 
Result so far: 312.0
If we take 60 away from 83, we end up with 23.
Fetch the next digit (0) from the dividend, attach it to 23 and continue: 230 / 30

Advancing to step 5:
30 can be fit into 230 7 times, resulting in a remainder of 20.
Write down 7 as next digit of the result. 
Result so far: 3127.0
If we subtract 210 from 230, we get 20.
Bring next digit (9) of the dividend behind the 20 and repeat the process: 209 / 30

Advancing to step 6:
The number 30 fits into 209 6 times, leaving a remainder of 29.
Put 6 as the next digit of the answer. 
Result so far: 31276.0
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.
Use 9 as the next digit of our solution. 
Result so far: 31276.9
If we subtract 270 from 290, 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.

Advancing to step 8:
The number 30 fits into 200 6 times, leaving a remainder of 20.
The number 6 becomes the next digit in our result. 
Result so far: 31276.96
Subtracting 180 from 200 leaves us 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:
When dividing 200 by 30, we get 6 with a remainder of 20.
The number 6 becomes the next digit in our result. 
Result so far: 31276.966
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.

The final result is 31276.966 with a remainder of 0.002.