667478 ÷ 80 
The aim is to understand the frequency of 80 in 667478.

Let's proceed to step 1:
80 can be fit into 6 0 times, resulting in a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 80

Moving on to step 2:
When dividing 66 by 80, we get 0 with a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Fetch the next digit (7) from the dividend, attach it to 66 and continue: 667 / 80

Step 3:
80 goes into 667 8 times with a remainder of 27.
Put 8 as the next digit of the answer. 
Result so far: 8.0
If we take 640 away from 667, we end up with 27.
Grab the next digit (4) from the dividend, add it to 27, then carry on: 274 / 80

Step 4:
80 goes into 274 3 times with a remainder of 34.
Record the quotient 3 as the next digit in the result. 
Result so far: 83.0
If we take 240 away from 274, we end up with 34.
Include the next digit (7) from the dividend after 34, then repeat: 347 / 80

Going ahead to step 5:
80 can be fit into 347 4 times, resulting in a remainder of 27.
Use 4 as the next digit of our solution. 
Result so far: 834.0
Subtracting 320 from 347 leaves us with 27.
Take the next digit (8) from the dividend and append it to 27, then repeat: 278 / 80

On to step 6:
80 goes into 278 3 times with a remainder of 38.
Write down 3 as next digit of the result. 
Result so far: 8343.0
Subtract 240 from 278 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 7:
380 divided by 80 is 4 with a remainder of 60.
Use 4 as the next digit of our solution. 
Result so far: 8343.4
Subtracting 320 from 380 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 8:
The number 80 fits into 600 7 times, leaving a remainder of 40.
Record the quotient 7 as the next digit in the result. 
Result so far: 8343.47
Subtracting 560 from 600 leaves us 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.

On to step 9:
400 divided by 80 is 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 8343.475
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 10:
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: 8343.475
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.

On to step 11:
If we divide 0 by 80, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 8343.475
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 8343.475 with a remaining 0.0.