We're dividing 423707 by 80 
The aim is to understand the frequency of 80 in 423707.

Going ahead to step 1:
4 divided by 80 is 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 80

Moving on to step 2:
The number 80 fits into 42 0 times, leaving a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Append the next digit (3) from the dividend to 42 and continue with: 423 / 80

Going ahead to step 3:
The number 80 fits into 423 5 times, leaving a remainder of 23.
Write down 5 as next digit of the result. 
Result so far: 5.0
If we subtract 400 from 423, we get 23.
Append the next digit (7) from the dividend to 23 and continue with: 237 / 80

Advancing to step 4:
80 goes into 237 2 times with a remainder of 77.
The number 2 becomes the next digit in our result. 
Result so far: 52.0
Deduct 160 from 237 and we're left with 77.
Grab the next digit (0) from the dividend, add it to 77, then carry on: 770 / 80

On to step 5:
80 can be fit into 770 9 times, resulting in a remainder of 50.
The next digit of our result is 9. 
Result so far: 529.0
Deduct 720 from 770 and we're left with 50.
Include the next digit (7) from the dividend after 50, then repeat: 507 / 80

On to step 6:
80 can be fit into 507 6 times, resulting in a remainder of 27.
Use 6 as the next digit of our solution. 
Result so far: 5296.0
If we take 480 away from 507, we end up with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 7:
80 goes into 270 3 times with a remainder of 30.
The next digit of our result is 3. 
Result so far: 5296.3
The remainder is 30 after subtracting 240 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 8:
80 can be fit into 300 3 times, resulting in a remainder of 60.
Use 3 as the next digit of our solution. 
Result so far: 5296.33
If we subtract 240 from 300, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

The final result is 5296.33 with a remainder of 0.06.