We look at the division of 28143 by 30 
The aim is to understand the frequency of 30 in 28143.

Going ahead to step 1:
When dividing 2 by 30, we get 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 30

Let's proceed to step 2:
30 goes into 28 0 times with a remainder of 28.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 28 leaves us with 28.
Append the next digit (1) from the dividend to 28 and continue with: 281 / 30

Step 3:
When dividing 281 by 30, we get 9 with a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 9.0
If we take 270 away from 281, we end up with 11.
Grab the next digit (4) from the dividend, add it to 11, then carry on: 114 / 30

Moving on to step 4:
If we divide 114 by 30, we get 3 and a remainder of 24.
The number 3 becomes the next digit in our result. 
Result so far: 93.0
Subtracting 90 from 114 leaves us with 24.
Fetch the next digit (3) from the dividend, attach it to 24 and continue: 243 / 30

Step 5:
30 can be fit into 243 8 times, resulting in a remainder of 3.
The next digit of our result is 8. 
Result so far: 938.0
The remainder is 3 after subtracting 240 from 243.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 6:
When dividing 30 by 30, we get 1 with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 938.1
If we take 30 away from 30, we end up with 0.
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 7:
When dividing 0 by 30, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 938.1
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
If we divide 0 by 30, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 938.1
Subtract 0 from 0 to 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.

After the division, we end up with 938.1 and a remainder of 0.0.