We're dividing 835621 by 20 
The aim is to understand the frequency of 20 in 835621.

Let's proceed to step 1:
8 divided by 20 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (3) from the dividend, add it to 8, then carry on: 83 / 20

Moving on to step 2:
If we divide 83 by 20, we get 4 and a remainder of 3.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
The remainder is 3 after subtracting 80 from 83.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 20

On to step 3:
20 goes into 35 1 times with a remainder of 15.
Write down 1 as next digit of the result. 
Result so far: 41.0
Deduct 20 from 35 and we're left with 15.
Fetch the next digit (6) from the dividend, attach it to 15 and continue: 156 / 20

Step 4:
20 goes into 156 7 times with a remainder of 16.
The number 7 becomes the next digit in our result. 
Result so far: 417.0
Subtracting 140 from 156 leaves us with 16.
Bring next digit (2) of the dividend behind the 16 and repeat the process: 162 / 20

On to step 5:
The number 20 fits into 162 8 times, leaving a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 4178.0
Subtracting 160 from 162 leaves us with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 20

Going ahead to step 6:
21 divided by 20 is 1 with a remainder of 1.
The next digit of our result is 1. 
Result so far: 41781.0
Deduct 20 from 21 and we're left 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:
The number 20 fits into 10 0 times, leaving a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 41781.0
If we take 0 away from 10, we end up 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.

Moving on to step 8:
20 can be fit into 100 5 times, resulting in a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 41781.05
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.

Let's proceed 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: 41781.05
Subtract 0 from 0 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.

Let's proceed to step 10:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 41781.05
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.

In conclusion, the division gives 41781.05 with a balance of 0.0.