843383 ÷ 20 
The aim is to understand the frequency of 20 in 843383.

On to step 1:
8 divided by 20 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (4) from the dividend to 8 and continue with: 84 / 20

Step 2:
If we divide 84 by 20, we get 4 and a remainder of 4.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtract 80 from 84 to get 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 20

On to step 3:
20 goes into 43 2 times with a remainder of 3.
Write down 2 as next digit of the result. 
Result so far: 42.0
If we subtract 40 from 43, we get 3.
Include the next digit (3) from the dividend after 3, then repeat: 33 / 20

On to step 4:
20 can be fit into 33 1 times, resulting in a remainder of 13.
Write down 1 as next digit of the result. 
Result so far: 421.0
The remainder is 13 after subtracting 20 from 33.
Include the next digit (8) from the dividend after 13, then repeat: 138 / 20

On to step 5:
When dividing 138 by 20, we get 6 with a remainder of 18.
Use 6 as the next digit of our solution. 
Result so far: 4216.0
If we subtract 120 from 138, we get 18.
Include the next digit (3) from the dividend after 18, then repeat: 183 / 20

On to step 6:
If we divide 183 by 20, we get 9 and a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 42169.0
Deduct 180 from 183 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 7:
20 can be fit into 30 1 times, resulting in a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 42169.1
If we subtract 20 from 30, 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.

On to step 8:
100 divided by 20 is 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 42169.15
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.

On to step 9:
If we divide 0 by 20, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 42169.15
Deduct 0 from 0 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 10:
If we divide 0 by 20, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 42169.15
Subtracting 0 from 0 leaves us 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.

The final outcome is 42169.15, with a leftover of 0.0.