518594 ÷ 80 
The aim is to understand the frequency of 80 in 518594.

Going ahead to step 1:
80 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 80

Advancing to step 2:
The number 80 fits into 51 0 times, leaving a remainder of 51.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Fetch the next digit (8) from the dividend, attach it to 51 and continue: 518 / 80

Going ahead to step 3:
80 can be fit into 518 6 times, resulting in a remainder of 38.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Subtract 480 from 518 to get 38.
Grab the next digit (5) from the dividend, add it to 38, then carry on: 385 / 80

On to step 4:
80 can be fit into 385 4 times, resulting in a remainder of 65.
Record the quotient 4 as the next digit in the result. 
Result so far: 64.0
If we subtract 320 from 385, we get 65.
Take the next digit (9) from the dividend and append it to 65, then repeat: 659 / 80

Let's proceed to step 5:
80 goes into 659 8 times with a remainder of 19.
The next digit of our result is 8. 
Result so far: 648.0
If we take 640 away from 659, we end up with 19.
Include the next digit (4) from the dividend after 19, then repeat: 194 / 80

Going ahead to step 6:
When dividing 194 by 80, we get 2 with a remainder of 34.
The next digit of our result is 2. 
Result so far: 6482.0
If we take 160 away from 194, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 7:
80 can be fit into 340 4 times, resulting in a remainder of 20.
Put 4 as the next digit of the answer. 
Result so far: 6482.4
Deduct 320 from 340 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 8:
80 can be fit into 200 2 times, resulting in a remainder of 40.
The next digit of our result is 2. 
Result so far: 6482.42
Subtract 160 from 200 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 9:
80 can be fit into 400 5 times, resulting in a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 6482.425
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.

Moving on to step 10:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 6482.425
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 11:
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: 6482.425
Deduct 0 from 0 and we're left 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.

The final outcome is 6482.425, with a leftover of 0.0.