We look at the division of 317399 by 20 
The aim is to understand the frequency of 20 in 317399.

Let's proceed to step 1:
If we divide 3 by 20, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 20

Going ahead to step 2:
31 divided by 20 is 1 with a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 20 from 31 and we're left with 11.
Fetch the next digit (7) from the dividend, attach it to 11 and continue: 117 / 20

Let's proceed to step 3:
20 can be fit into 117 5 times, resulting in a remainder of 17.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Deduct 100 from 117 and we're left with 17.
Include the next digit (3) from the dividend after 17, then repeat: 173 / 20

Let's proceed to step 4:
20 goes into 173 8 times with a remainder of 13.
The next digit of our result is 8. 
Result so far: 158.0
If we subtract 160 from 173, we get 13.
Append the next digit (9) from the dividend to 13 and continue with: 139 / 20

Step 5:
When dividing 139 by 20, we get 6 with a remainder of 19.
The number 6 becomes the next digit in our result. 
Result so far: 1586.0
If we take 120 away from 139, we end up with 19.
Bring next digit (9) of the dividend behind the 19 and repeat the process: 199 / 20

Moving on to step 6:
20 can be fit into 199 9 times, resulting in a remainder of 19.
Write down 9 as next digit of the result. 
Result so far: 15869.0
If we subtract 180 from 199, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 7:
190 divided by 20 is 9 with a remainder of 10.
Put 9 as the next digit of the answer. 
Result so far: 15869.9
If we subtract 180 from 190, 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.

Step 8:
100 divided by 20 is 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 15869.95
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.

Step 9:
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: 15869.95
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.

Moving on to step 10:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 15869.95
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.

The quotient of the division is 15869.95, and the remainder is 0.0.