Let's divide 904999 by 20
The aim is to understand the frequency of 20 in 904999.

Going ahead to step 1:
If we divide 9 by 20, we get 0 and a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 20

Advancing to step 2:
When dividing 90 by 20, we get 4 with a remainder of 10.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 80 from 90 and we're left with 10.
Take the next digit (4) from the dividend and append it to 10, then repeat: 104 / 20

On to step 3:
104 divided by 20 is 5 with a remainder of 4.
Record the quotient 5 as the next digit in the result. 
Result so far: 45.0
Subtract 100 from 104 to get 4.
Append the next digit (9) from the dividend to 4 and continue with: 49 / 20

Advancing to step 4:
49 divided by 20 is 2 with a remainder of 9.
The next digit of our result is 2. 
Result so far: 452.0
If we take 40 away from 49, we end up with 9.
Grab the next digit (9) from the dividend, add it to 9, then carry on: 99 / 20

Let's proceed to step 5:
20 can be fit into 99 4 times, resulting in a remainder of 19.
Use 4 as the next digit of our solution. 
Result so far: 4524.0
Subtracting 80 from 99 leaves us with 19.
Fetch the next digit (9) from the dividend, attach it to 19 and continue: 199 / 20

Step 6:
When dividing 199 by 20, we get 9 with a remainder of 19.
Write down 9 as next digit of the result. 
Result so far: 45249.0
Subtracting 180 from 199 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 7:
The number 20 fits into 190 9 times, leaving a remainder of 10.
The number 9 becomes the next digit in our result. 
Result so far: 45249.9
Deduct 180 from 190 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.

Advancing to step 8:
If we divide 100 by 20, we get 5 and a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 45249.95
The remainder is 0 after subtracting 100 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
If we divide 0 by 20, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 45249.95
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.

Going ahead to step 10:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 45249.95
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.

Our division results in 45249.95 with a remaining 0.0.