We look at the division of 343572 by 80 
The aim is to understand the frequency of 80 in 343572.

Going ahead to step 1:
When dividing 3 by 80, we get 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Append the next digit (4) from the dividend to 3 and continue with: 34 / 80

On to step 2:
When dividing 34 by 80, we get 0 with a remainder of 34.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 34 after subtracting 0 from 34.
Fetch the next digit (3) from the dividend, attach it to 34 and continue: 343 / 80

Advancing to step 3:
When dividing 343 by 80, we get 4 with a remainder of 23.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we take 320 away from 343, we end up with 23.
Take the next digit (5) from the dividend and append it to 23, then repeat: 235 / 80

Advancing to step 4:
80 can be fit into 235 2 times, resulting in a remainder of 75.
Use 2 as the next digit of our solution. 
Result so far: 42.0
Subtract 160 from 235 to get 75.
Fetch the next digit (7) from the dividend, attach it to 75 and continue: 757 / 80

Step 5:
80 can be fit into 757 9 times, resulting in a remainder of 37.
Use 9 as the next digit of our solution. 
Result so far: 429.0
Subtracting 720 from 757 leaves us with 37.
Take the next digit (2) from the dividend and append it to 37, then repeat: 372 / 80

Moving on to step 6:
80 can be fit into 372 4 times, resulting in a remainder of 52.
Write down 4 as next digit of the result. 
Result so far: 4294.0
The remainder is 52 after subtracting 320 from 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 7:
520 divided by 80 is 6 with a remainder of 40.
Use 6 as the next digit of our solution. 
Result so far: 4294.6
If we subtract 480 from 520, 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.

Step 8:
80 goes into 400 5 times with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 4294.65
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.

Moving on to step 9:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 4294.65
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 10:
80 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 4294.65
If we subtract 0 from 0, 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.

The final result is 4294.65 with a remainder of 0.0.