We divide 615429 by 30
The aim is to understand the frequency of 30 in 615429.

Step 1:
6 divided by 30 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 30

Step 2:
30 goes into 61 2 times with a remainder of 1.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 60 from 61 and we're left with 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 30

Step 3:
If we divide 15 by 30, we get 0 and a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 20.0
If we take 0 away from 15, we end up with 15.
Grab the next digit (4) from the dividend, add it to 15, then carry on: 154 / 30

Advancing to step 4:
If we divide 154 by 30, we get 5 and a remainder of 4.
The next digit of our result is 5. 
Result so far: 205.0
Deduct 150 from 154 and we're left with 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 30

Step 5:
30 can be fit into 42 1 times, resulting in a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 2051.0
If we subtract 30 from 42, we get 12.
Bring next digit (9) of the dividend behind the 12 and repeat the process: 129 / 30

Let's proceed to step 6:
30 can be fit into 129 4 times, resulting in a remainder of 9.
Use 4 as the next digit of our solution. 
Result so far: 20514.0
Deduct 120 from 129 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 7:
When dividing 90 by 30, we get 3 with a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 20514.3
The remainder is 0 after subtracting 90 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
30 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 20514.3
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
When dividing 0 by 30, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 20514.3
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 20514.3 with a remainder of 0.0.