Let's divide 423031 by 80
The aim is to understand the frequency of 80 in 423031.

On to step 1:
When dividing 4 by 80, we get 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 80

Going ahead to step 2:
42 divided by 80 is 0 with a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Fetch the next digit (3) from the dividend, attach it to 42 and continue: 423 / 80

On to step 3:
80 goes into 423 5 times with a remainder of 23.
Write down 5 as next digit of the result. 
Result so far: 5.0
Deduct 400 from 423 and we're left with 23.
Take the next digit (0) from the dividend and append it to 23, then repeat: 230 / 80

Step 4:
80 can be fit into 230 2 times, resulting in a remainder of 70.
Write down 2 as next digit of the result. 
Result so far: 52.0
Deduct 160 from 230 and we're left with 70.
Take the next digit (3) from the dividend and append it to 70, then repeat: 703 / 80

Going ahead to step 5:
If we divide 703 by 80, we get 8 and a remainder of 63.
Record the quotient 8 as the next digit in the result. 
Result so far: 528.0
Subtract 640 from 703 to get 63.
Include the next digit (1) from the dividend after 63, then repeat: 631 / 80

Going ahead to step 6:
When dividing 631 by 80, we get 7 with a remainder of 71.
Record the quotient 7 as the next digit in the result. 
Result so far: 5287.0
The remainder is 71 after subtracting 560 from 631.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Step 7:
When dividing 710 by 80, we get 8 with a remainder of 70.
Record the quotient 8 as the next digit in the result. 
Result so far: 5287.8
If we take 640 away from 710, 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.

Advancing to step 8:
The number 80 fits into 700 8 times, leaving a remainder of 60.
Write down 8 as next digit of the result. 
Result so far: 5287.88
Deduct 640 from 700 and we're left 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.

The final outcome is 5287.88, with a leftover of 0.06.