166252 ÷ 20 
The aim is to understand the frequency of 20 in 166252.

Step 1:
20 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (6) from the dividend and append it to 1, then repeat: 16 / 20

Moving on to step 2:
The number 20 fits into 16 0 times, leaving a remainder of 16.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 16, we get 16.
Fetch the next digit (6) from the dividend, attach it to 16 and continue: 166 / 20

On to step 3:
20 can be fit into 166 8 times, resulting in a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Deduct 160 from 166 and we're left with 6.
Take the next digit (2) from the dividend and append it to 6, then repeat: 62 / 20

Step 4:
The number 20 fits into 62 3 times, leaving a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 83.0
Deduct 60 from 62 and we're left with 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 20

Moving on to step 5:
If we divide 25 by 20, we get 1 and a remainder of 5.
Put 1 as the next digit of the answer. 
Result so far: 831.0
If we subtract 20 from 25, we get 5.
Include the next digit (2) from the dividend after 5, then repeat: 52 / 20

Going ahead to step 6:
20 goes into 52 2 times with a remainder of 12.
Put 2 as the next digit of the answer. 
Result so far: 8312.0
The remainder is 12 after subtracting 40 from 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 7:
If we divide 120 by 20, we get 6 and a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 8312.6
Deduct 120 from 120 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 8:
0 divided by 20 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 8312.6
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.

Step 9:
20 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 8312.6
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 result is 8312.6 with a remainder of 0.0.