Let's divide 630689 by 20
The aim is to understand the frequency of 20 in 630689.

Going ahead to step 1:
6 divided by 20 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 20

On to step 2:
When dividing 63 by 20, we get 3 with a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 60 from 63, we get 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 20

Let's proceed to step 3:
20 goes into 30 1 times with a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 31.0
If we subtract 20 from 30, we get 10.
Take the next digit (6) from the dividend and append it to 10, then repeat: 106 / 20

Step 4:
20 can be fit into 106 5 times, resulting in a remainder of 6.
Use 5 as the next digit of our solution. 
Result so far: 315.0
Deduct 100 from 106 and we're left with 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 20

On to step 5:
68 divided by 20 is 3 with a remainder of 8.
Put 3 as the next digit of the answer. 
Result so far: 3153.0
Subtract 60 from 68 to get 8.
Take the next digit (9) from the dividend and append it to 8, then repeat: 89 / 20

On to step 6:
If we divide 89 by 20, we get 4 and a remainder of 9.
Write down 4 as next digit of the result. 
Result so far: 31534.0
If we subtract 80 from 89, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 7:
The number 20 fits into 90 4 times, leaving a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 31534.4
Subtract 80 from 90 to 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.

Going ahead to step 8:
When dividing 100 by 20, we get 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 31534.45
If we subtract 100 from 100, 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.

Moving on to 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: 31534.45
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.

Step 10:
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: 31534.45
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.

The final outcome is 31534.45, with a leftover of 0.0.