99705459 ÷ 20 
The aim is to understand the frequency of 20 in 99705459.

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.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 20

Moving on to step 2:
If we divide 99 by 20, we get 4 and a remainder of 19.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 80 from 99 and we're left with 19.
Fetch the next digit (7) from the dividend, attach it to 19 and continue: 197 / 20

Moving on to step 3:
197 divided by 20 is 9 with a remainder of 17.
Record the quotient 9 as the next digit in the result. 
Result so far: 49.0
If we subtract 180 from 197, we get 17.
Bring next digit (0) of the dividend behind the 17 and repeat the process: 170 / 20

Let's proceed to step 4:
The number 20 fits into 170 8 times, leaving a remainder of 10.
Record the quotient 8 as the next digit in the result. 
Result so far: 498.0
Subtract 160 from 170 to get 10.
Take the next digit (5) from the dividend and append it to 10, then repeat: 105 / 20

Let's proceed to step 5:
105 divided by 20 is 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 4985.0
The remainder is 5 after subtracting 100 from 105.
Grab the next digit (4) from the dividend, add it to 5, then carry on: 54 / 20

Going ahead to step 6:
The number 20 fits into 54 2 times, leaving a remainder of 14.
The next digit of our result is 2. 
Result so far: 49852.0
Deduct 40 from 54 and we're left with 14.
Include the next digit (5) from the dividend after 14, then repeat: 145 / 20

Let's proceed to step 7:
When dividing 145 by 20, we get 7 with a remainder of 5.
Use 7 as the next digit of our solution. 
Result so far: 498527.0
If we take 140 away from 145, we end up with 5.
Fetch the next digit (9) from the dividend, attach it to 5 and continue: 59 / 20

Moving on to step 8:
20 goes into 59 2 times with a remainder of 19.
The number 2 becomes the next digit in our result. 
Result so far: 4985272.0
The remainder is 19 after subtracting 40 from 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 9:
When dividing 190 by 20, we get 9 with a remainder of 10.
Use 9 as the next digit of our solution. 
Result so far: 4985272.9
Subtracting 180 from 190 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.

Moving on to step 10:
20 goes into 100 5 times with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 4985272.95
Deduct 100 from 100 and we're left 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.

On to step 11:
The number 20 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 4985272.95
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 12:
When dividing 0 by 20, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 4985272.95
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 4985272.95 with a remaining 0.0.