We look at the division of 598391 by 20 
The aim is to understand the frequency of 20 in 598391.

Advancing to step 1:
The number 20 fits into 5 0 times, leaving a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Take the next digit (9) from the dividend and append it to 5, then repeat: 59 / 20

Let's proceed to step 2:
If we divide 59 by 20, we get 2 and a remainder of 19.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 40 from 59, we get 19.
Grab the next digit (8) from the dividend, add it to 19, then carry on: 198 / 20

On to step 3:
198 divided by 20 is 9 with a remainder of 18.
Put 9 as the next digit of the answer. 
Result so far: 29.0
Deduct 180 from 198 and we're left with 18.
Grab the next digit (3) from the dividend, add it to 18, then carry on: 183 / 20

Advancing to step 4:
20 goes into 183 9 times with a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 299.0
If we take 180 away from 183, we end up with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 20

Going ahead to step 5:
If we divide 39 by 20, we get 1 and a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 2991.0
If we take 20 away from 39, we end up with 19.
Take the next digit (1) from the dividend and append it to 19, then repeat: 191 / 20

Moving on to step 6:
The number 20 fits into 191 9 times, leaving a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 29919.0
Subtract 180 from 191 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 7:
If we divide 110 by 20, we get 5 and a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 29919.5
Subtract 100 from 110 to 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 8:
20 can be fit into 100 5 times, resulting in a remainder of 0.
The next digit of our result is 5. 
Result so far: 29919.55
Subtract 100 from 100 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.

In conclusion, the division gives 29919.55 with a balance of 0.0.