We look at the division of 349900 by 30 
The aim is to understand the frequency of 30 in 349900.

On to step 1:
30 goes into 3 0 times with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (4) of the dividend behind the 3 and repeat the process: 34 / 30

Let's proceed to step 2:
30 goes into 34 1 times with a remainder of 4.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 30 from 34 to get 4.
Fetch the next digit (9) from the dividend, attach it to 4 and continue: 49 / 30

Going ahead to step 3:
30 goes into 49 1 times with a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we take 30 away from 49, we end up with 19.
Grab the next digit (9) from the dividend, add it to 19, then carry on: 199 / 30

Step 4:
When dividing 199 by 30, we get 6 with a remainder of 19.
Write down 6 as next digit of the result. 
Result so far: 116.0
Deduct 180 from 199 and we're left with 19.
Append the next digit (0) from the dividend to 19 and continue with: 190 / 30

On to step 5:
30 goes into 190 6 times with a remainder of 10.
Put 6 as the next digit of the answer. 
Result so far: 1166.0
Subtracting 180 from 190 leaves us with 10.
Include the next digit (0) from the dividend after 10, then repeat: 100 / 30

On to step 6:
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: 11663.0
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.

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: 11663.3
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.

Advancing to step 8:
30 goes into 100 3 times with a remainder of 10.
The next digit of our result is 3. 
Result so far: 11663.33
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.

The final outcome is 11663.33, with a leftover of 0.01.