852400 ÷ 80 
The aim is to understand the frequency of 80 in 852400.

Advancing to step 1:
8 divided by 80 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (5) from the dividend after 8, then repeat: 85 / 80

Moving on to step 2:
85 divided by 80 is 1 with a remainder of 5.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 80 from 85 leaves us with 5.
Include the next digit (2) from the dividend after 5, then repeat: 52 / 80

Let's proceed to step 3:
The number 80 fits into 52 0 times, leaving a remainder of 52.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Subtracting 0 from 52 leaves us with 52.
Append the next digit (4) from the dividend to 52 and continue with: 524 / 80

Let's proceed to step 4:
524 divided by 80 is 6 with a remainder of 44.
Use 6 as the next digit of our solution. 
Result so far: 106.0
If we subtract 480 from 524, we get 44.
Take the next digit (0) from the dividend and append it to 44, then repeat: 440 / 80

Going ahead to step 5:
80 goes into 440 5 times with a remainder of 40.
Write down 5 as next digit of the result. 
Result so far: 1065.0
Subtracting 400 from 440 leaves us with 40.
Bring next digit (0) of the dividend behind the 40 and repeat the process: 400 / 80

Moving on to step 6:
80 goes into 400 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 10655.0
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.

Advancing to step 7:
If we divide 0 by 80, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 10655.0
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.

Step 8:
The number 80 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10655.0
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.

Our division results in 10655.0 with a remaining 0.0.