Let's divide 20523920 by 80
The aim is to understand the frequency of 80 in 20523920.

Moving on to step 1:
If we divide 2 by 80, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 80

Moving on to step 2:
80 goes into 20 0 times with a remainder of 20.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 20 leaves us with 20.
Grab the next digit (5) from the dividend, add it to 20, then carry on: 205 / 80

Advancing to step 3:
205 divided by 80 is 2 with a remainder of 45.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 160 from 205 and we're left with 45.
Grab the next digit (2) from the dividend, add it to 45, then carry on: 452 / 80

Moving on to step 4:
The number 80 fits into 452 5 times, leaving a remainder of 52.
The next digit of our result is 5. 
Result so far: 25.0
Subtracting 400 from 452 leaves us with 52.
Append the next digit (3) from the dividend to 52 and continue with: 523 / 80

Let's proceed to step 5:
The number 80 fits into 523 6 times, leaving a remainder of 43.
Use 6 as the next digit of our solution. 
Result so far: 256.0
If we take 480 away from 523, we end up with 43.
Append the next digit (9) from the dividend to 43 and continue with: 439 / 80

On to step 6:
439 divided by 80 is 5 with a remainder of 39.
The next digit of our result is 5. 
Result so far: 2565.0
Subtract 400 from 439 to get 39.
Take the next digit (2) from the dividend and append it to 39, then repeat: 392 / 80

Step 7:
80 can be fit into 392 4 times, resulting in a remainder of 72.
The number 4 becomes the next digit in our result. 
Result so far: 25654.0
If we take 320 away from 392, we end up with 72.
Bring next digit (0) of the dividend behind the 72 and repeat the process: 720 / 80

Going ahead to step 8:
The number 80 fits into 720 9 times, leaving a remainder of 0.
Put 9 as the next digit of the answer. 
Result so far: 256549.0
The remainder is 0 after subtracting 720 from 720.
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:
If we divide 0 by 80, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 256549.0
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.

Moving on to step 10:
When dividing 0 by 80, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 256549.0
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.

The final result is 256549.0 with a remainder of 0.0.