We divide 396121 by 80
The aim is to understand the frequency of 80 in 396121.

Advancing to step 1:
The number 80 fits into 3 0 times, leaving a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 80

Going ahead to step 2:
80 can be fit into 39 0 times, resulting in a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Append the next digit (6) from the dividend to 39 and continue with: 396 / 80

Advancing to step 3:
80 can be fit into 396 4 times, resulting in a remainder of 76.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 320 from 396 and we're left with 76.
Include the next digit (1) from the dividend after 76, then repeat: 761 / 80

Moving on to step 4:
761 divided by 80 is 9 with a remainder of 41.
Record the quotient 9 as the next digit in the result. 
Result so far: 49.0
If we subtract 720 from 761, we get 41.
Include the next digit (2) from the dividend after 41, then repeat: 412 / 80

Moving on to step 5:
When dividing 412 by 80, we get 5 with a remainder of 12.
Use 5 as the next digit of our solution. 
Result so far: 495.0
Deduct 400 from 412 and we're left with 12.
Bring next digit (1) of the dividend behind the 12 and repeat the process: 121 / 80

On to step 6:
When dividing 121 by 80, we get 1 with a remainder of 41.
Record the quotient 1 as the next digit in the result. 
Result so far: 4951.0
Deduct 80 from 121 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.

Moving on to step 7:
80 goes into 410 5 times with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 4951.5
The remainder is 10 after subtracting 400 from 410.
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:
80 can be fit into 100 1 times, resulting in a remainder of 20.
Use 1 as the next digit of our solution. 
Result so far: 4951.51
Subtracting 80 from 100 leaves us 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.

Advancing to step 9:
80 can be fit into 200 2 times, resulting in a remainder of 40.
Write down 2 as next digit of the result. 
Result so far: 4951.512
Deduct 160 from 200 and we're left with 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:
When dividing 400 by 80, we get 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 4951.5125
Deduct 400 from 400 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.

Step 11:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 4951.5125
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.

Advancing to step 12:
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: 4951.5125
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.

Our division results in 4951.5125 with a remaining 0.0.