We're dividing 535971 by 30 
The aim is to understand the frequency of 30 in 535971.

Going ahead to step 1:
If we divide 5 by 30, we get 0 and a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 30

Let's proceed to step 2:
30 goes into 53 1 times with a remainder of 23.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 30 from 53 to get 23.
Bring next digit (5) of the dividend behind the 23 and repeat the process: 235 / 30

Going ahead to step 3:
When dividing 235 by 30, we get 7 with a remainder of 25.
The next digit of our result is 7. 
Result so far: 17.0
Subtracting 210 from 235 leaves us with 25.
Include the next digit (9) from the dividend after 25, then repeat: 259 / 30

Moving on to step 4:
When dividing 259 by 30, we get 8 with a remainder of 19.
The next digit of our result is 8. 
Result so far: 178.0
The remainder is 19 after subtracting 240 from 259.
Append the next digit (7) from the dividend to 19 and continue with: 197 / 30

Going ahead to step 5:
The number 30 fits into 197 6 times, leaving a remainder of 17.
The number 6 becomes the next digit in our result. 
Result so far: 1786.0
Deduct 180 from 197 and we're left with 17.
Fetch the next digit (1) from the dividend, attach it to 17 and continue: 171 / 30

On to step 6:
When dividing 171 by 30, we get 5 with a remainder of 21.
Record the quotient 5 as the next digit in the result. 
Result so far: 17865.0
Deduct 150 from 171 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 7:
When dividing 210 by 30, we get 7 with a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 17865.7
If we take 210 away from 210, 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.

Let's proceed 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: 17865.7
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.

Step 9:
0 divided by 30 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 17865.7
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.

The final result is 17865.7 with a remainder of 0.0.