We're dividing 491680 by 84 
The aim is to understand the frequency of 84 in 491680.

On to step 1:
The number 84 fits into 4 0 times, leaving a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Fetch the next digit (9) from the dividend, attach it to 4 and continue: 49 / 84

Let's proceed to step 2:
When dividing 49 by 84, we get 0 with a remainder of 49.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 49, we get 49.
Grab the next digit (1) from the dividend, add it to 49, then carry on: 491 / 84

Advancing to step 3:
491 divided by 84 is 5 with a remainder of 71.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtracting 420 from 491 leaves us with 71.
Grab the next digit (6) from the dividend, add it to 71, then carry on: 716 / 84

Going ahead to step 4:
The number 84 fits into 716 8 times, leaving a remainder of 44.
The next digit of our result is 8. 
Result so far: 58.0
Subtracting 672 from 716 leaves us with 44.
Take the next digit (8) from the dividend and append it to 44, then repeat: 448 / 84

On to step 5:
The number 84 fits into 448 5 times, leaving a remainder of 28.
The number 5 becomes the next digit in our result. 
Result so far: 585.0
Subtracting 420 from 448 leaves us with 28.
Grab the next digit (0) from the dividend, add it to 28, then carry on: 280 / 84

Moving on to step 6:
84 goes into 280 3 times with a remainder of 28.
Record the quotient 3 as the next digit in the result. 
Result so far: 5853.0
If we subtract 252 from 280, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 7:
If we divide 280 by 84, we get 3 and a remainder of 28.
Put 3 as the next digit of the answer. 
Result so far: 5853.3
Subtract 252 from 280 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 8:
84 can be fit into 280 3 times, resulting in a remainder of 28.
The next digit of our result is 3. 
Result so far: 5853.33
If we subtract 252 from 280, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

After the division, we end up with 5853.33 and a remainder of 0.028.