451524 ÷ 20 
The aim is to understand the frequency of 20 in 451524.

Moving on to step 1:
4 divided by 20 is 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 20

On to step 2:
When dividing 45 by 20, we get 2 with a remainder of 5.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 40 from 45 and we're left with 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 20

Advancing to step 3:
20 goes into 51 2 times with a remainder of 11.
Record the quotient 2 as the next digit in the result. 
Result so far: 22.0
Subtracting 40 from 51 leaves us with 11.
Append the next digit (5) from the dividend to 11 and continue with: 115 / 20

Moving on to step 4:
When dividing 115 by 20, we get 5 with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 225.0
If we subtract 100 from 115, we get 15.
Take the next digit (2) from the dividend and append it to 15, then repeat: 152 / 20

Let's proceed to step 5:
152 divided by 20 is 7 with a remainder of 12.
The next digit of our result is 7. 
Result so far: 2257.0
If we subtract 140 from 152, we get 12.
Append the next digit (4) from the dividend to 12 and continue with: 124 / 20

Let's proceed to step 6:
124 divided by 20 is 6 with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 22576.0
If we subtract 120 from 124, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 7:
20 can be fit into 40 2 times, resulting in a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 22576.2
Subtracting 40 from 40 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.

Going ahead to step 8:
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: 22576.2
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.

Going ahead to step 9:
0 divided by 20 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 22576.2
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.

In conclusion, the division gives 22576.2 with a balance of 0.0.