Let's divide 161321 by 20
The aim is to understand the frequency of 20 in 161321.

Advancing to step 1:
20 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 20

Going ahead to step 2:
16 divided by 20 is 0 with 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 (1) from the dividend, attach it to 16 and continue: 161 / 20

Let's proceed to step 3:
When dividing 161 by 20, we get 8 with a remainder of 1.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtract 160 from 161 to get 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 20

Going ahead to step 4:
20 can be fit into 13 0 times, resulting in a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 80.0
Subtract 0 from 13 to get 13.
Grab the next digit (2) from the dividend, add it to 13, then carry on: 132 / 20

Moving on to step 5:
If we divide 132 by 20, we get 6 and a remainder of 12.
The next digit of our result is 6. 
Result so far: 806.0
If we take 120 away from 132, we end up with 12.
Include the next digit (1) from the dividend after 12, then repeat: 121 / 20

Advancing to step 6:
20 can be fit into 121 6 times, resulting in a remainder of 1.
Write down 6 as next digit of the result. 
Result so far: 8066.0
Subtracting 120 from 121 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 7:
If we divide 10 by 20, we get 0 and a remainder of 10.
The next digit of our result is 0. 
Result so far: 8066.0
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
If we divide 100 by 20, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 8066.05
If we take 100 away from 100, 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 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: 8066.05
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.

Advancing to step 10:
20 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 8066.05
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 8066.05 with a remaining 0.0.