125664 ÷ 20 
The aim is to understand the frequency of 20 in 125664.

On to step 1:
If we divide 1 by 20, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 20

Let's proceed to step 2:
20 can be fit into 12 0 times, resulting in a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Append the next digit (5) from the dividend to 12 and continue with: 125 / 20

On to step 3:
If we divide 125 by 20, we get 6 and a remainder of 5.
Put 6 as the next digit of the answer. 
Result so far: 6.0
If we subtract 120 from 125, we get 5.
Fetch the next digit (6) from the dividend, attach it to 5 and continue: 56 / 20

Going ahead to step 4:
The number 20 fits into 56 2 times, leaving a remainder of 16.
Put 2 as the next digit of the answer. 
Result so far: 62.0
Subtracting 40 from 56 leaves us with 16.
Fetch the next digit (6) from the dividend, attach it to 16 and continue: 166 / 20

Advancing to step 5:
The number 20 fits into 166 8 times, leaving a remainder of 6.
Use 8 as the next digit of our solution. 
Result so far: 628.0
The remainder is 6 after subtracting 160 from 166.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 20

Going ahead to step 6:
64 divided by 20 is 3 with a remainder of 4.
The next digit of our result is 3. 
Result so far: 6283.0
Subtract 60 from 64 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 7:
20 can be fit into 40 2 times, resulting in a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 6283.2
The remainder is 0 after subtracting 40 from 40.
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 8:
0 divided by 20 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 6283.2
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.

Let's proceed to step 9:
The number 20 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 6283.2
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.

The final result is 6283.2 with a remainder of 0.0.