We look at the division of 777588 by 80 
The aim is to understand the frequency of 80 in 777588.

Step 1:
When dividing 7 by 80, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Include the next digit (7) from the dividend after 7, then repeat: 77 / 80

Going ahead to step 2:
77 divided by 80 is 0 with a remainder of 77.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 77, we get 77.
Grab the next digit (7) from the dividend, add it to 77, then carry on: 777 / 80

Moving on to step 3:
80 goes into 777 9 times with a remainder of 57.
Write down 9 as next digit of the result. 
Result so far: 9.0
Deduct 720 from 777 and we're left with 57.
Fetch the next digit (5) from the dividend, attach it to 57 and continue: 575 / 80

Step 4:
80 goes into 575 7 times with a remainder of 15.
The next digit of our result is 7. 
Result so far: 97.0
If we take 560 away from 575, we end up with 15.
Bring next digit (8) of the dividend behind the 15 and repeat the process: 158 / 80

Going ahead to step 5:
When dividing 158 by 80, we get 1 with a remainder of 78.
Put 1 as the next digit of the answer. 
Result so far: 971.0
Subtract 80 from 158 to get 78.
Bring next digit (8) of the dividend behind the 78 and repeat the process: 788 / 80

Going ahead to step 6:
80 goes into 788 9 times with a remainder of 68.
The number 9 becomes the next digit in our result. 
Result so far: 9719.0
If we subtract 720 from 788, we get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Moving on to step 7:
80 goes into 680 8 times with a remainder of 40.
Write down 8 as next digit of the result. 
Result so far: 9719.8
Subtracting 640 from 680 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.

Moving on to step 8:
80 goes into 400 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 9719.85
If we take 400 away from 400, 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.

On to step 9:
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: 9719.85
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.

Let's proceed to step 10:
When dividing 0 by 80, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 9719.85
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.

After the division, we end up with 9719.85 and a remainder of 0.0.