401717 divided by 20 
The aim is to understand the frequency of 20 in 401717.

Advancing to step 1:
When dividing 4 by 20, we get 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Append the next digit (0) from the dividend to 4 and continue with: 40 / 20

On to step 2:
20 can be fit into 40 2 times, resulting in a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 40 from 40, we get 0.
Fetch the next digit (1) from the dividend, attach it to 0 and continue: 1 / 20

Step 3:
The number 20 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
Subtract 0 from 1 to get 1.
Include the next digit (7) from the dividend after 1, then repeat: 17 / 20

Moving on to step 4:
20 goes into 17 0 times with a remainder of 17.
Record the quotient 0 as the next digit in the result. 
Result so far: 200.0
Subtracting 0 from 17 leaves us with 17.
Include the next digit (1) from the dividend after 17, then repeat: 171 / 20

Let's proceed to step 5:
20 goes into 171 8 times with a remainder of 11.
Record the quotient 8 as the next digit in the result. 
Result so far: 2008.0
If we take 160 away from 171, we end up with 11.
Grab the next digit (7) from the dividend, add it to 11, then carry on: 117 / 20

Let's proceed to step 6:
The number 20 fits into 117 5 times, leaving a remainder of 17.
The next digit of our result is 5. 
Result so far: 20085.0
The remainder is 17 after subtracting 100 from 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 7:
170 divided by 20 is 8 with a remainder of 10.
The number 8 becomes the next digit in our result. 
Result so far: 20085.8
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.

On to step 8:
When dividing 100 by 20, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 20085.85
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.

On to step 9:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 20085.85
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.

Step 10:
If we divide 0 by 20, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 20085.85
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 final outcome is 20085.85, with a leftover of 0.0.