We look at the division of 843501 by 20 
The aim is to understand the frequency of 20 in 843501.

Advancing 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
If we subtract 0 from 8, we get 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 20

Going ahead to step 2:
If we divide 84 by 20, we get 4 and a remainder of 4.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 80 away from 84, we end up with 4.
Append the next digit (3) from the dividend to 4 and continue with: 43 / 20

On to step 3:
If we divide 43 by 20, we get 2 and a remainder of 3.
The number 2 becomes the next digit in our result. 
Result so far: 42.0
Subtract 40 from 43 to get 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 20

Moving on to step 4:
The number 20 fits into 35 1 times, leaving a remainder of 15.
The number 1 becomes the next digit in our result. 
Result so far: 421.0
Subtracting 20 from 35 leaves us with 15.
Include the next digit (0) from the dividend after 15, then repeat: 150 / 20

Let's proceed to step 5:
The number 20 fits into 150 7 times, leaving a remainder of 10.
Use 7 as the next digit of our solution. 
Result so far: 4217.0
If we take 140 away from 150, we end up with 10.
Append the next digit (1) from the dividend to 10 and continue with: 101 / 20

Step 6:
20 goes into 101 5 times with a remainder of 1.
The number 5 becomes the next digit in our result. 
Result so far: 42175.0
If we take 100 away from 101, we end up 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.

Moving on to step 7:
If we divide 10 by 20, we get 0 and a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 42175.0
Subtracting 0 from 10 leaves us 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.

Going ahead to step 8:
The number 20 fits into 100 5 times, leaving a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 42175.05
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:
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: 42175.05
If we take 0 away from 0, 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 10:
When dividing 0 by 20, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 42175.05
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.

In conclusion, the division gives 42175.05 with a balance of 0.0.