869671 ÷ 80 
The aim is to understand the frequency of 80 in 869671.

Going ahead to step 1:
8 divided by 80 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 80

Moving on to step 2:
If we divide 86 by 80, we get 1 and a remainder of 6.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 80 from 86, we get 6.
Include the next digit (9) from the dividend after 6, then repeat: 69 / 80

Let's proceed to step 3:
If we divide 69 by 80, we get 0 and a remainder of 69.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Subtract 0 from 69 to get 69.
Fetch the next digit (6) from the dividend, attach it to 69 and continue: 696 / 80

Let's proceed to step 4:
When dividing 696 by 80, we get 8 with a remainder of 56.
Record the quotient 8 as the next digit in the result. 
Result so far: 108.0
Subtracting 640 from 696 leaves us with 56.
Take the next digit (7) from the dividend and append it to 56, then repeat: 567 / 80

Step 5:
80 can be fit into 567 7 times, resulting in a remainder of 7.
The next digit of our result is 7. 
Result so far: 1087.0
Subtract 560 from 567 to get 7.
Append the next digit (1) from the dividend to 7 and continue with: 71 / 80

Advancing to step 6:
If we divide 71 by 80, we get 0 and a remainder of 71.
Use 0 as the next digit of our solution. 
Result so far: 10870.0
Subtracting 0 from 71 leaves us with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Going ahead to step 7:
710 divided by 80 is 8 with a remainder of 70.
The next digit of our result is 8. 
Result so far: 10870.8
If we subtract 640 from 710, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 8:
80 can be fit into 700 8 times, resulting in a remainder of 60.
Use 8 as the next digit of our solution. 
Result so far: 10870.88
The remainder is 60 after subtracting 640 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Our division results in 10870.88 with a remaining 0.06.