579421 divided by 30 
The aim is to understand the frequency of 30 in 579421.

Moving on to step 1:
30 goes into 5 0 times with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Grab the next digit (7) from the dividend, add it to 5, then carry on: 57 / 30

Step 2:
When dividing 57 by 30, we get 1 with a remainder of 27.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 30 from 57 and we're left with 27.
Fetch the next digit (9) from the dividend, attach it to 27 and continue: 279 / 30

Moving on to step 3:
If we divide 279 by 30, we get 9 and a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
Subtracting 270 from 279 leaves us with 9.
Take the next digit (4) from the dividend and append it to 9, then repeat: 94 / 30

Let's proceed to step 4:
30 goes into 94 3 times with a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 193.0
Subtracting 90 from 94 leaves us with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 30

Advancing to step 5:
30 can be fit into 42 1 times, resulting in a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 1931.0
Deduct 30 from 42 and we're left with 12.
Take the next digit (1) from the dividend and append it to 12, then repeat: 121 / 30

Step 6:
If we divide 121 by 30, we get 4 and a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 19314.0
Deduct 120 from 121 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 7:
10 divided by 30 is 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 19314.0
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
100 divided by 30 is 3 with a remainder of 10.
Put 3 as the next digit of the answer. 
Result so far: 19314.03
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 9:
If we divide 100 by 30, we get 3 and a remainder of 10.
Write down 3 as next digit of the result. 
Result so far: 19314.033
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final outcome is 19314.033, with a leftover of 0.001.