551009 divided by 80 
The aim is to understand the frequency of 80 in 551009.

Moving on to step 1:
When dividing 5 by 80, we get 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Take the next digit (5) from the dividend and append it to 5, then repeat: 55 / 80

Advancing to step 2:
55 divided by 80 is 0 with a remainder of 55.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 55 leaves us with 55.
Include the next digit (1) from the dividend after 55, then repeat: 551 / 80

On to step 3:
When dividing 551 by 80, we get 6 with a remainder of 71.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Deduct 480 from 551 and we're left with 71.
Include the next digit (0) from the dividend after 71, then repeat: 710 / 80

On to step 4:
When dividing 710 by 80, we get 8 with a remainder of 70.
The next digit of our result is 8. 
Result so far: 68.0
Subtract 640 from 710 to get 70.
Append the next digit (0) from the dividend to 70 and continue with: 700 / 80

Step 5:
The number 80 fits into 700 8 times, leaving a remainder of 60.
Record the quotient 8 as the next digit in the result. 
Result so far: 688.0
The remainder is 60 after subtracting 640 from 700.
Fetch the next digit (9) from the dividend, attach it to 60 and continue: 609 / 80

On to step 6:
80 can be fit into 609 7 times, resulting in a remainder of 49.
The number 7 becomes the next digit in our result. 
Result so far: 6887.0
If we take 560 away from 609, we end up with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Let's proceed to step 7:
When dividing 490 by 80, we get 6 with a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 6887.6
If we subtract 480 from 490, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
80 goes into 100 1 times with a remainder of 20.
Record the quotient 1 as the next digit in the result. 
Result so far: 6887.61
If we take 80 away from 100, we end up 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.

Moving on to step 9:
200 divided by 80 is 2 with a remainder of 40.
Put 2 as the next digit of the answer. 
Result so far: 6887.612
The remainder is 40 after subtracting 160 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 10:
80 goes into 400 5 times with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 6887.6125
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 11:
When dividing 0 by 80, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 6887.6125
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.

On to step 12:
When dividing 0 by 80, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 6887.6125
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 6887.6125, with a leftover of 0.0.