We look at the division of 128168 by 30 
The aim is to understand the frequency of 30 in 128168.

Going ahead to step 1:
The number 30 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 30

Moving on to step 2:
When dividing 12 by 30, we get 0 with a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Take the next digit (8) from the dividend and append it to 12, then repeat: 128 / 30

Let's proceed to step 3:
If we divide 128 by 30, we get 4 and a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we take 120 away from 128, we end up with 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 30

Let's proceed to step 4:
30 can be fit into 81 2 times, resulting in a remainder of 21.
Use 2 as the next digit of our solution. 
Result so far: 42.0
If we take 60 away from 81, we end up with 21.
Grab the next digit (6) from the dividend, add it to 21, then carry on: 216 / 30

Step 5:
When dividing 216 by 30, we get 7 with a remainder of 6.
Use 7 as the next digit of our solution. 
Result so far: 427.0
Subtracting 210 from 216 leaves us with 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 30

Step 6:
If we divide 68 by 30, we get 2 and a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 4272.0
Subtract 60 from 68 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 7:
When dividing 80 by 30, we get 2 with a remainder of 20.
The next digit of our result is 2. 
Result so far: 4272.2
If we take 60 away from 80, we end up 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.

On to step 8:
If we divide 200 by 30, we get 6 and a remainder of 20.
The number 6 becomes the next digit in our result. 
Result so far: 4272.26
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.

Advancing to step 9:
If we divide 200 by 30, we get 6 and a remainder of 20.
Use 6 as the next digit of our solution. 
Result so far: 4272.266
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.

The final result is 4272.266 with a remainder of 0.002.