423937 ÷ 80 
The aim is to understand the frequency of 80 in 423937.

Advancing to step 1:
80 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 80

Going ahead to step 2:
80 can be fit into 42 0 times, resulting in a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Grab the next digit (3) from the dividend, add it to 42, then carry on: 423 / 80

On to step 3:
The number 80 fits into 423 5 times, leaving a remainder of 23.
The next digit of our result is 5. 
Result so far: 5.0
If we subtract 400 from 423, we get 23.
Append the next digit (9) from the dividend to 23 and continue with: 239 / 80

Going ahead to step 4:
80 can be fit into 239 2 times, resulting in a remainder of 79.
The next digit of our result is 2. 
Result so far: 52.0
Subtract 160 from 239 to get 79.
Grab the next digit (3) from the dividend, add it to 79, then carry on: 793 / 80

On to step 5:
If we divide 793 by 80, we get 9 and a remainder of 73.
Record the quotient 9 as the next digit in the result. 
Result so far: 529.0
Subtracting 720 from 793 leaves us with 73.
Fetch the next digit (7) from the dividend, attach it to 73 and continue: 737 / 80

Step 6:
80 can be fit into 737 9 times, resulting in a remainder of 17.
The number 9 becomes the next digit in our result. 
Result so far: 5299.0
Deduct 720 from 737 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 7:
When dividing 170 by 80, we get 2 with a remainder of 10.
Write down 2 as next digit of the result. 
Result so far: 5299.2
Deduct 160 from 170 and we're left 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.

Moving on to 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: 5299.21
Subtract 80 from 100 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 9:
80 goes into 200 2 times with a remainder of 40.
Use 2 as the next digit of our solution. 
Result so far: 5299.212
If we subtract 160 from 200, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 10:
80 can be fit into 400 5 times, resulting in a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 5299.2125
Subtract 400 from 400 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.

Moving on to step 11:
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: 5299.2125
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 12:
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: 5299.2125
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.

After the division, we end up with 5299.2125 and a remainder of 0.0.