424640 ÷ 80 
The aim is to understand the frequency of 80 in 424640.

Moving on to step 1:
If we divide 4 by 80, we get 0 and a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 80

Moving on to step 2:
When dividing 42 by 80, we get 0 with a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Fetch the next digit (4) from the dividend, attach it to 42 and continue: 424 / 80

On to step 3:
If we divide 424 by 80, we get 5 and a remainder of 24.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Deduct 400 from 424 and we're left with 24.
Take the next digit (6) from the dividend and append it to 24, then repeat: 246 / 80

Step 4:
80 goes into 246 3 times with a remainder of 6.
Write down 3 as next digit of the result. 
Result so far: 53.0
Subtract 240 from 246 to get 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 80

Advancing to step 5:
The number 80 fits into 64 0 times, leaving a remainder of 64.
Write down 0 as next digit of the result. 
Result so far: 530.0
Subtract 0 from 64 to get 64.
Bring next digit (0) of the dividend behind the 64 and repeat the process: 640 / 80

Advancing to step 6:
640 divided by 80 is 8 with a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 5308.0
Subtract 640 from 640 to 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 7:
The number 80 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 5308.0
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.

On to step 8:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 5308.0
Subtract 0 from 0 to 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 outcome is 5308.0, with a leftover of 0.0.