We're dividing 873670 by 80 
The aim is to understand the frequency of 80 in 873670.

On to step 1:
80 can be fit into 8 0 times, resulting in a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 80

Advancing to step 2:
80 can be fit into 87 1 times, resulting in a remainder of 7.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 80 from 87, we get 7.
Append the next digit (3) from the dividend to 7 and continue with: 73 / 80

Moving on to step 3:
The number 80 fits into 73 0 times, leaving a remainder of 73.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtracting 0 from 73 leaves us with 73.
Fetch the next digit (6) from the dividend, attach it to 73 and continue: 736 / 80

Let's proceed to step 4:
80 goes into 736 9 times with a remainder of 16.
Write down 9 as next digit of the result. 
Result so far: 109.0
If we subtract 720 from 736, we get 16.
Append the next digit (7) from the dividend to 16 and continue with: 167 / 80

Going ahead to step 5:
If we divide 167 by 80, we get 2 and a remainder of 7.
Put 2 as the next digit of the answer. 
Result so far: 1092.0
Subtract 160 from 167 to get 7.
Append the next digit (0) from the dividend to 7 and continue with: 70 / 80

Advancing to step 6:
80 goes into 70 0 times with a remainder of 70.
Record the quotient 0 as the next digit in the result. 
Result so far: 10920.0
If we take 0 away from 70, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 7:
80 goes into 700 8 times with a remainder of 60.
Record the quotient 8 as the next digit in the result. 
Result so far: 10920.8
Subtracting 640 from 700 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 8:
80 goes into 600 7 times with a remainder of 40.
The number 7 becomes the next digit in our result. 
Result so far: 10920.87
Subtracting 560 from 600 leaves us with 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 goes into 400 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 10920.875
Subtracting 400 from 400 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.

Advancing to step 10:
80 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10920.875
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.

Going ahead to step 11:
80 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10920.875
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.

The final result is 10920.875 with a remainder of 0.0.