68556909 ÷ 80 
The aim is to understand the frequency of 80 in 68556909.

Moving on to step 1:
80 can be fit into 6 0 times, resulting in a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Fetch the next digit (8) from the dividend, attach it to 6 and continue: 68 / 80

Let's proceed to step 2:
80 goes into 68 0 times with a remainder of 68.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 68 and we're left with 68.
Fetch the next digit (5) from the dividend, attach it to 68 and continue: 685 / 80

Step 3:
When dividing 685 by 80, we get 8 with a remainder of 45.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtract 640 from 685 to get 45.
Append the next digit (5) from the dividend to 45 and continue with: 455 / 80

Moving on to step 4:
80 can be fit into 455 5 times, resulting in a remainder of 55.
Record the quotient 5 as the next digit in the result. 
Result so far: 85.0
Subtracting 400 from 455 leaves us with 55.
Append the next digit (6) from the dividend to 55 and continue with: 556 / 80

Moving on to step 5:
When dividing 556 by 80, we get 6 with a remainder of 76.
The next digit of our result is 6. 
Result so far: 856.0
Deduct 480 from 556 and we're left with 76.
Bring next digit (9) of the dividend behind the 76 and repeat the process: 769 / 80

On to step 6:
If we divide 769 by 80, we get 9 and a remainder of 49.
Record the quotient 9 as the next digit in the result. 
Result so far: 8569.0
Deduct 720 from 769 and we're left with 49.
Take the next digit (0) from the dividend and append it to 49, then repeat: 490 / 80

Advancing to step 7:
80 can be fit into 490 6 times, resulting in a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 85696.0
If we take 480 away from 490, we end up with 10.
Grab the next digit (9) from the dividend, add it to 10, then carry on: 109 / 80

Moving on to step 8:
80 can be fit into 109 1 times, resulting in a remainder of 29.
Write down 1 as next digit of the result. 
Result so far: 856961.0
If we take 80 away from 109, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Advancing to step 9:
80 can be fit into 290 3 times, resulting in a remainder of 50.
Put 3 as the next digit of the answer. 
Result so far: 856961.3
The remainder is 50 after subtracting 240 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 10:
500 divided by 80 is 6 with a remainder of 20.
The next digit of our result is 6. 
Result so far: 856961.36
Deduct 480 from 500 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.

Advancing to step 11:
200 divided by 80 is 2 with a remainder of 40.
Record the quotient 2 as the next digit in the result. 
Result so far: 856961.362
If we subtract 160 from 200, we 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.

Advancing to step 12:
If we divide 400 by 80, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 856961.3625
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 13:
0 divided by 80 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 856961.3625
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.

Moving on to step 14:
0 divided by 80 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 856961.3625
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 856961.3625 and a remainder of 0.0.