478187 ÷ 30 
The aim is to understand the frequency of 30 in 478187.

Step 1:
30 can be fit into 4 0 times, resulting in a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (7) from the dividend, add it to 4, then carry on: 47 / 30

On to step 2:
30 can be fit into 47 1 times, resulting in a remainder of 17.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 30 from 47, we get 17.
Fetch the next digit (8) from the dividend, attach it to 17 and continue: 178 / 30

Step 3:
When dividing 178 by 30, we get 5 with a remainder of 28.
The next digit of our result is 5. 
Result so far: 15.0
The remainder is 28 after subtracting 150 from 178.
Bring next digit (1) of the dividend behind the 28 and repeat the process: 281 / 30

Step 4:
The number 30 fits into 281 9 times, leaving a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 159.0
If we take 270 away from 281, we end up with 11.
Bring next digit (8) of the dividend behind the 11 and repeat the process: 118 / 30

Going ahead to step 5:
If we divide 118 by 30, we get 3 and a remainder of 28.
Write down 3 as next digit of the result. 
Result so far: 1593.0
If we subtract 90 from 118, we get 28.
Bring next digit (7) of the dividend behind the 28 and repeat the process: 287 / 30

Let's proceed to step 6:
When dividing 287 by 30, we get 9 with a remainder of 17.
Use 9 as the next digit of our solution. 
Result so far: 15939.0
Subtracting 270 from 287 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 7:
If we divide 170 by 30, we get 5 and a remainder of 20.
Use 5 as the next digit of our solution. 
Result so far: 15939.5
The remainder is 20 after subtracting 150 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 8:
If we divide 200 by 30, we get 6 and a remainder of 20.
The next digit of our result is 6. 
Result so far: 15939.56
Deduct 180 from 200 and we're left 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.

Going ahead to step 9:
When dividing 200 by 30, we get 6 with a remainder of 20.
Write down 6 as next digit of the result. 
Result so far: 15939.566
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.

The final outcome is 15939.566, with a leftover of 0.002.