516293 ÷ 30 
The aim is to understand the frequency of 30 in 516293.

Step 1:
When dividing 5 by 30, we get 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 30

On to step 2:
The number 30 fits into 51 1 times, leaving a remainder of 21.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 21 after subtracting 30 from 51.
Take the next digit (6) from the dividend and append it to 21, then repeat: 216 / 30

On to step 3:
216 divided by 30 is 7 with a remainder of 6.
Put 7 as the next digit of the answer. 
Result so far: 17.0
If we subtract 210 from 216, we get 6.
Append the next digit (2) from the dividend to 6 and continue with: 62 / 30

Moving on to step 4:
62 divided by 30 is 2 with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 172.0
Subtracting 60 from 62 leaves us with 2.
Append the next digit (9) from the dividend to 2 and continue with: 29 / 30

Moving on to step 5:
30 can be fit into 29 0 times, resulting in a remainder of 29.
Use 0 as the next digit of our solution. 
Result so far: 1720.0
Deduct 0 from 29 and we're left with 29.
Fetch the next digit (3) from the dividend, attach it to 29 and continue: 293 / 30

Going ahead to step 6:
When dividing 293 by 30, we get 9 with a remainder of 23.
The number 9 becomes the next digit in our result. 
Result so far: 17209.0
The remainder is 23 after subtracting 270 from 293.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

On to step 7:
30 can be fit into 230 7 times, resulting in a remainder of 20.
Write down 7 as next digit of the result. 
Result so far: 17209.7
Deduct 210 from 230 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 8:
200 divided by 30 is 6 with a remainder of 20.
Use 6 as the next digit of our solution. 
Result so far: 17209.76
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.

Moving on to step 9:
The number 30 fits into 200 6 times, leaving a remainder of 20.
Write down 6 as next digit of the result. 
Result so far: 17209.766
Subtract 180 from 200 to 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.

After the division, we end up with 17209.766 and a remainder of 0.002.