451015 ÷ 80 
The aim is to understand the frequency of 80 in 451015.

Let's proceed to step 1:
4 divided by 80 is 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 80

On to step 2:
The number 80 fits into 45 0 times, leaving a remainder of 45.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 45 and we're left with 45.
Grab the next digit (1) from the dividend, add it to 45, then carry on: 451 / 80

Moving on to step 3:
The number 80 fits into 451 5 times, leaving a remainder of 51.
Write down 5 as next digit of the result. 
Result so far: 5.0
Deduct 400 from 451 and we're left with 51.
Include the next digit (0) from the dividend after 51, then repeat: 510 / 80

Advancing to step 4:
When dividing 510 by 80, we get 6 with a remainder of 30.
The number 6 becomes the next digit in our result. 
Result so far: 56.0
If we take 480 away from 510, we end up with 30.
Include the next digit (1) from the dividend after 30, then repeat: 301 / 80

Going ahead to step 5:
If we divide 301 by 80, we get 3 and a remainder of 61.
Record the quotient 3 as the next digit in the result. 
Result so far: 563.0
Subtract 240 from 301 to get 61.
Include the next digit (5) from the dividend after 61, then repeat: 615 / 80

On to step 6:
When dividing 615 by 80, we get 7 with a remainder of 55.
Write down 7 as next digit of the result. 
Result so far: 5637.0
Subtracting 560 from 615 leaves us with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Advancing to step 7:
If we divide 550 by 80, we get 6 and a remainder of 70.
Write down 6 as next digit of the result. 
Result so far: 5637.6
Subtract 480 from 550 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 8:
80 goes into 700 8 times with a remainder of 60.
Write down 8 as next digit of the result. 
Result so far: 5637.68
The remainder is 60 after subtracting 640 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 9:
If we divide 600 by 80, we get 7 and a remainder of 40.
Record the quotient 7 as the next digit in the result. 
Result so far: 5637.687
Subtracting 560 from 600 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 10:
80 goes into 400 5 times with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 5637.6875
Subtracting 400 from 400 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.

On to step 11:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 5637.6875
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.

Step 12:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 5637.6875
If we subtract 0 from 0, we 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 final result is 5637.6875 with a remainder of 0.0.