We look at the division of 420974 by 30 
The aim is to understand the frequency of 30 in 420974.

Going ahead to 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
Subtract 0 from 4 to get 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 30

Advancing to step 2:
When dividing 42 by 30, we get 1 with a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 30 from 42 leaves us with 12.
Append the next digit (0) from the dividend to 12 and continue with: 120 / 30

Going ahead to step 3:
30 can be fit into 120 4 times, resulting in a remainder of 0.
The next digit of our result is 4. 
Result so far: 14.0
If we subtract 120 from 120, we get 0.
Append the next digit (9) from the dividend to 0 and continue with: 9 / 30

On to step 4:
30 goes into 9 0 times with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 140.0
Subtract 0 from 9 to get 9.
Bring next digit (7) of the dividend behind the 9 and repeat the process: 97 / 30

Advancing to step 5:
30 can be fit into 97 3 times, resulting in a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 1403.0
If we take 90 away from 97, we end up with 7.
Fetch the next digit (4) from the dividend, attach it to 7 and continue: 74 / 30

Moving on to step 6:
When dividing 74 by 30, we get 2 with a remainder of 14.
Use 2 as the next digit of our solution. 
Result so far: 14032.0
If we subtract 60 from 74, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 7:
140 divided by 30 is 4 with a remainder of 20.
The number 4 becomes the next digit in our result. 
Result so far: 14032.4
Subtract 120 from 140 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.

On to step 8:
30 goes into 200 6 times with a remainder of 20.
The next digit of our result is 6. 
Result so far: 14032.46
If we take 180 away from 200, 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.

Moving on to step 9:
200 divided by 30 is 6 with a remainder of 20.
Record the quotient 6 as the next digit in the result. 
Result so far: 14032.466
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.

After the division, we end up with 14032.466 and a remainder of 0.002.