We divide 438921 by 80
The aim is to understand the frequency of 80 in 438921.

Advancing to step 1:
4 divided by 80 is 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 (3) of the dividend behind the 4 and repeat the process: 43 / 80

Advancing to step 2:
80 can be fit into 43 0 times, resulting in a remainder of 43.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 43, we end up with 43.
Grab the next digit (8) from the dividend, add it to 43, then carry on: 438 / 80

Let's proceed to step 3:
80 can be fit into 438 5 times, resulting in a remainder of 38.
Write down 5 as next digit of the result. 
Result so far: 5.0
Deduct 400 from 438 and we're left with 38.
Grab the next digit (9) from the dividend, add it to 38, then carry on: 389 / 80

On to step 4:
If we divide 389 by 80, we get 4 and a remainder of 69.
Put 4 as the next digit of the answer. 
Result so far: 54.0
If we subtract 320 from 389, we get 69.
Fetch the next digit (2) from the dividend, attach it to 69 and continue: 692 / 80

On to step 5:
80 goes into 692 8 times with a remainder of 52.
The number 8 becomes the next digit in our result. 
Result so far: 548.0
Deduct 640 from 692 and we're left with 52.
Grab the next digit (1) from the dividend, add it to 52, then carry on: 521 / 80

On to step 6:
If we divide 521 by 80, we get 6 and a remainder of 41.
Write down 6 as next digit of the result. 
Result so far: 5486.0
Deduct 480 from 521 and we're left with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Let's proceed to step 7:
If we divide 410 by 80, we get 5 and a remainder of 10.
The next digit of our result is 5. 
Result so far: 5486.5
If we take 400 away from 410, we end up 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.

On to step 8:
80 goes into 100 1 times with a remainder of 20.
Put 1 as the next digit of the answer. 
Result so far: 5486.51
If we take 80 away from 100, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 9:
80 can be fit into 200 2 times, resulting in a remainder of 40.
The next digit of our result is 2. 
Result so far: 5486.512
The remainder is 40 after subtracting 160 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 10:
If we divide 400 by 80, we get 5 and a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 5486.5125
If we take 400 away from 400, we end up 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 11:
If we divide 0 by 80, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 5486.5125
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.

On to step 12:
If we divide 0 by 80, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 5486.5125
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.

The final result is 5486.5125 with a remainder of 0.0.