We look at the division of 19997377 by 20 
The aim is to understand the frequency of 20 in 19997377.

Let's proceed to step 1:
When dividing 1 by 20, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 20

Going ahead to step 2:
19 divided by 20 is 0 with a remainder of 19.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 19 after subtracting 0 from 19.
Fetch the next digit (9) from the dividend, attach it to 19 and continue: 199 / 20

Let's proceed to step 3:
20 can be fit into 199 9 times, resulting in a remainder of 19.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
If we subtract 180 from 199, we get 19.
Take the next digit (9) from the dividend and append it to 19, then repeat: 199 / 20

Going ahead to step 4:
The number 20 fits into 199 9 times, leaving a remainder of 19.
Put 9 as the next digit of the answer. 
Result so far: 99.0
The remainder is 19 after subtracting 180 from 199.
Fetch the next digit (7) from the dividend, attach it to 19 and continue: 197 / 20

Going ahead to step 5:
197 divided by 20 is 9 with a remainder of 17.
Put 9 as the next digit of the answer. 
Result so far: 999.0
The remainder is 17 after subtracting 180 from 197.
Include the next digit (3) from the dividend after 17, then repeat: 173 / 20

On to step 6:
If we divide 173 by 20, we get 8 and a remainder of 13.
Write down 8 as next digit of the result. 
Result so far: 9998.0
Deduct 160 from 173 and we're left with 13.
Append the next digit (7) from the dividend to 13 and continue with: 137 / 20

On to step 7:
20 goes into 137 6 times with a remainder of 17.
Write down 6 as next digit of the result. 
Result so far: 99986.0
Subtract 120 from 137 to get 17.
Include the next digit (7) from the dividend after 17, then repeat: 177 / 20

Moving on to step 8:
The number 20 fits into 177 8 times, leaving a remainder of 17.
Use 8 as the next digit of our solution. 
Result so far: 999868.0
Subtract 160 from 177 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 9:
If we divide 170 by 20, we get 8 and a remainder of 10.
Use 8 as the next digit of our solution. 
Result so far: 999868.8
The remainder is 10 after subtracting 160 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 10:
The number 20 fits into 100 5 times, leaving a remainder of 0.
The next digit of our result is 5. 
Result so far: 999868.85
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.

Step 11:
0 divided by 20 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 999868.85
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.

Let's proceed to step 12:
When dividing 0 by 20, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 999868.85
If we subtract 0 from 0, we 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 quotient of the division is 999868.85, and the remainder is 0.0.