Let's divide 851825 by 80
The aim is to understand the frequency of 80 in 851825.

Moving on to step 1:
80 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Include the next digit (5) from the dividend after 8, then repeat: 85 / 80

Moving on to step 2:
If we divide 85 by 80, we get 1 and a remainder of 5.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 80 from 85 to get 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 80

On to step 3:
80 can be fit into 51 0 times, resulting in a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 10.0
If we take 0 away from 51, we end up with 51.
Append the next digit (8) from the dividend to 51 and continue with: 518 / 80

On to step 4:
518 divided by 80 is 6 with a remainder of 38.
Record the quotient 6 as the next digit in the result. 
Result so far: 106.0
If we subtract 480 from 518, we get 38.
Include the next digit (2) from the dividend after 38, then repeat: 382 / 80

Going ahead to step 5:
382 divided by 80 is 4 with a remainder of 62.
The number 4 becomes the next digit in our result. 
Result so far: 1064.0
Subtract 320 from 382 to get 62.
Append the next digit (5) from the dividend to 62 and continue with: 625 / 80

Step 6:
80 goes into 625 7 times with a remainder of 65.
The number 7 becomes the next digit in our result. 
Result so far: 10647.0
The remainder is 65 after subtracting 560 from 625.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Advancing to step 7:
If we divide 650 by 80, we get 8 and a remainder of 10.
The number 8 becomes the next digit in our result. 
Result so far: 10647.8
If we take 640 away from 650, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
The number 80 fits into 100 1 times, leaving a remainder of 20.
Record the quotient 1 as the next digit in the result. 
Result so far: 10647.81
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.

Going ahead to step 9:
200 divided by 80 is 2 with a remainder of 40.
Write down 2 as next digit of the result. 
Result so far: 10647.812
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.

Going ahead to step 10:
The number 80 fits into 400 5 times, leaving a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 10647.8125
If we subtract 400 from 400, 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.

On to step 11:
If we divide 0 by 80, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 10647.8125
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.

Let's proceed to step 12:
0 divided by 80 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 10647.8125
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.

The final result is 10647.8125 with a remainder of 0.0.