We're dividing 16993808 by 20 
The aim is to understand the frequency of 20 in 16993808.

Let's proceed to step 1:
When dividing 1 by 20, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 20

Moving on to step 2:
If we divide 16 by 20, we get 0 and a remainder of 16.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 16 to get 16.
Grab the next digit (9) from the dividend, add it to 16, then carry on: 169 / 20

Let's proceed to step 3:
If we divide 169 by 20, we get 8 and a remainder of 9.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
If we take 160 away from 169, we end up with 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 20

On to step 4:
99 divided by 20 is 4 with a remainder of 19.
Write down 4 as next digit of the result. 
Result so far: 84.0
Subtracting 80 from 99 leaves us with 19.
Take the next digit (3) from the dividend and append it to 19, then repeat: 193 / 20

Step 5:
20 goes into 193 9 times with a remainder of 13.
Put 9 as the next digit of the answer. 
Result so far: 849.0
The remainder is 13 after subtracting 180 from 193.
Grab the next digit (8) from the dividend, add it to 13, then carry on: 138 / 20

On to step 6:
When dividing 138 by 20, we get 6 with a remainder of 18.
Write down 6 as next digit of the result. 
Result so far: 8496.0
If we take 120 away from 138, we end up with 18.
Append the next digit (0) from the dividend to 18 and continue with: 180 / 20

Advancing to step 7:
When dividing 180 by 20, we get 9 with a remainder of 0.
The next digit of our result is 9. 
Result so far: 84969.0
Deduct 180 from 180 and we're left with 0.
Grab the next digit (8) from the dividend, add it to 0, then carry on: 8 / 20

Moving on to step 8:
20 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 849690.0
Subtract 0 from 8 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 9:
When dividing 80 by 20, we get 4 with a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 849690.4
Deduct 80 from 80 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.

Advancing to step 10:
0 divided by 20 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 849690.4
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.

Moving on to step 11:
If we divide 0 by 20, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 849690.4
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.

The final result is 849690.4 with a remainder of 0.0.