We're dividing 770512 by 80 
The aim is to understand the frequency of 80 in 770512.

Advancing to step 1:
7 divided by 80 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Append the next digit (7) from the dividend to 7 and continue with: 77 / 80

Advancing to step 2:
The number 80 fits into 77 0 times, leaving a remainder of 77.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 77 leaves us with 77.
Grab the next digit (0) from the dividend, add it to 77, then carry on: 770 / 80

Step 3:
The number 80 fits into 770 9 times, leaving a remainder of 50.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
The remainder is 50 after subtracting 720 from 770.
Fetch the next digit (5) from the dividend, attach it to 50 and continue: 505 / 80

Let's proceed to step 4:
If we divide 505 by 80, we get 6 and a remainder of 25.
Put 6 as the next digit of the answer. 
Result so far: 96.0
Deduct 480 from 505 and we're left with 25.
Append the next digit (1) from the dividend to 25 and continue with: 251 / 80

Advancing to step 5:
80 can be fit into 251 3 times, resulting in a remainder of 11.
Record the quotient 3 as the next digit in the result. 
Result so far: 963.0
If we take 240 away from 251, we end up with 11.
Bring next digit (2) of the dividend behind the 11 and repeat the process: 112 / 80

Step 6:
112 divided by 80 is 1 with a remainder of 32.
Record the quotient 1 as the next digit in the result. 
Result so far: 9631.0
The remainder is 32 after subtracting 80 from 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 7:
The number 80 fits into 320 4 times, leaving a remainder of 0.
The next digit of our result is 4. 
Result so far: 9631.4
If we take 320 away from 320, 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.

Step 8:
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: 9631.4
If we take 0 away from 0, 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.

Going ahead to 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: 9631.4
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.

After the division, we end up with 9631.4 and a remainder of 0.0.