531937 ÷ 20 
The aim is to understand the frequency of 20 in 531937.

Step 1:
When dividing 5 by 20, we get 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 20

Going ahead to step 2:
When dividing 53 by 20, we get 2 with a remainder of 13.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 40 from 53 to get 13.
Fetch the next digit (1) from the dividend, attach it to 13 and continue: 131 / 20

Moving on to step 3:
The number 20 fits into 131 6 times, leaving a remainder of 11.
Write down 6 as next digit of the result. 
Result so far: 26.0
Deduct 120 from 131 and we're left with 11.
Bring next digit (9) of the dividend behind the 11 and repeat the process: 119 / 20

On to step 4:
119 divided by 20 is 5 with a remainder of 19.
Put 5 as the next digit of the answer. 
Result so far: 265.0
Subtract 100 from 119 to get 19.
Grab the next digit (3) from the dividend, add it to 19, then carry on: 193 / 20

Let's proceed to step 5:
20 can be fit into 193 9 times, resulting in a remainder of 13.
Record the quotient 9 as the next digit in the result. 
Result so far: 2659.0
If we subtract 180 from 193, we get 13.
Bring next digit (7) of the dividend behind the 13 and repeat the process: 137 / 20

Moving on to step 6:
If we divide 137 by 20, we get 6 and a remainder of 17.
Record the quotient 6 as the next digit in the result. 
Result so far: 26596.0
Deduct 120 from 137 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 7:
If we divide 170 by 20, we get 8 and a remainder of 10.
Put 8 as the next digit of the answer. 
Result so far: 26596.8
The remainder is 10 after subtracting 160 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
100 divided by 20 is 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 26596.85
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.

Step 9:
When dividing 0 by 20, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 26596.85
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:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 26596.85
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.

The quotient of the division is 26596.85, and the remainder is 0.0.