We're dividing 217413 by 20 
The aim is to understand the frequency of 20 in 217413.

On to step 1:
If we divide 2 by 20, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 20

Advancing to step 2:
If we divide 21 by 20, we get 1 and a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 20 from 21 to get 1.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 20

Going ahead to step 3:
If we divide 17 by 20, we get 0 and a remainder of 17.
Put 0 as the next digit of the answer. 
Result so far: 10.0
If we take 0 away from 17, we end up with 17.
Take the next digit (4) from the dividend and append it to 17, then repeat: 174 / 20

Step 4:
The number 20 fits into 174 8 times, leaving a remainder of 14.
Use 8 as the next digit of our solution. 
Result so far: 108.0
Deduct 160 from 174 and we're left with 14.
Append the next digit (1) from the dividend to 14 and continue with: 141 / 20

Moving on to step 5:
20 goes into 141 7 times with a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 1087.0
If we subtract 140 from 141, we get 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 20

On to step 6:
When dividing 13 by 20, we get 0 with a remainder of 13.
Write down 0 as next digit of the result. 
Result so far: 10870.0
Subtracting 0 from 13 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 7:
When dividing 130 by 20, we get 6 with a remainder of 10.
The number 6 becomes the next digit in our result. 
Result so far: 10870.6
Subtracting 120 from 130 leaves us with 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.
Record the quotient 5 as the next digit in the result. 
Result so far: 10870.65
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.

Going ahead to step 9:
20 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 10870.65
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.

Moving on to step 10:
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: 10870.65
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.

In conclusion, the division gives 10870.65 with a balance of 0.0.