We're dividing 861394 by 80 
The aim is to understand the frequency of 80 in 861394.

Moving on to step 1:
8 divided by 80 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 80

Moving on to step 2:
86 divided by 80 is 1 with a remainder of 6.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 80 from 86 leaves us with 6.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 80

Advancing to step 3:
80 goes into 61 0 times with a remainder of 61.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Subtracting 0 from 61 leaves us with 61.
Include the next digit (3) from the dividend after 61, then repeat: 613 / 80

Advancing to step 4:
80 goes into 613 7 times with a remainder of 53.
Use 7 as the next digit of our solution. 
Result so far: 107.0
Deduct 560 from 613 and we're left with 53.
Bring next digit (9) of the dividend behind the 53 and repeat the process: 539 / 80

Going ahead to step 5:
80 goes into 539 6 times with a remainder of 59.
Write down 6 as next digit of the result. 
Result so far: 1076.0
The remainder is 59 after subtracting 480 from 539.
Fetch the next digit (4) from the dividend, attach it to 59 and continue: 594 / 80

Advancing to step 6:
80 can be fit into 594 7 times, resulting in a remainder of 34.
Record the quotient 7 as the next digit in the result. 
Result so far: 10767.0
The remainder is 34 after subtracting 560 from 594.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 7:
80 can be fit into 340 4 times, resulting in a remainder of 20.
Write down 4 as next digit of the result. 
Result so far: 10767.4
If we subtract 320 from 340, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 8:
80 can be fit into 200 2 times, resulting in a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 10767.42
Subtract 160 from 200 to 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.

Step 9:
80 can be fit into 400 5 times, resulting in a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 10767.425
Deduct 400 from 400 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.

Let's proceed to step 10:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 10767.425
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.

Advancing to step 11:
When dividing 0 by 80, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 10767.425
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 10767.425 and a remainder of 0.0.