We're dividing 415574 by 80 
The aim is to understand the frequency of 80 in 415574.

Let's proceed to step 1:
The number 80 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Grab the next digit (1) from the dividend, add it to 4, then carry on: 41 / 80

Going ahead to step 2:
80 goes into 41 0 times with a remainder of 41.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 41 and we're left with 41.
Bring next digit (5) of the dividend behind the 41 and repeat the process: 415 / 80

Advancing to step 3:
The number 80 fits into 415 5 times, leaving a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtract 400 from 415 to get 15.
Bring next digit (5) of the dividend behind the 15 and repeat the process: 155 / 80

Let's proceed to step 4:
80 can be fit into 155 1 times, resulting in a remainder of 75.
Put 1 as the next digit of the answer. 
Result so far: 51.0
Subtracting 80 from 155 leaves us with 75.
Grab the next digit (7) from the dividend, add it to 75, then carry on: 757 / 80

Going ahead to step 5:
757 divided by 80 is 9 with a remainder of 37.
The next digit of our result is 9. 
Result so far: 519.0
The remainder is 37 after subtracting 720 from 757.
Take the next digit (4) from the dividend and append it to 37, then repeat: 374 / 80

Step 6:
80 goes into 374 4 times with a remainder of 54.
Use 4 as the next digit of our solution. 
Result so far: 5194.0
Subtracting 320 from 374 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 7:
If we divide 540 by 80, we get 6 and a remainder of 60.
The number 6 becomes the next digit in our result. 
Result so far: 5194.6
Subtracting 480 from 540 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 8:
If we divide 600 by 80, we get 7 and a remainder of 40.
Put 7 as the next digit of the answer. 
Result so far: 5194.67
The remainder is 40 after subtracting 560 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 9:
When dividing 400 by 80, we get 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 5194.675
Subtract 400 from 400 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 10:
When dividing 0 by 80, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 5194.675
Subtracting 0 from 0 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 11:
If we divide 0 by 80, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 5194.675
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 outcome is 5194.675, with a leftover of 0.0.