We look at the division of 280817 by 84 
The aim is to understand the frequency of 84 in 280817.

Advancing to step 1:
The number 84 fits into 2 0 times, leaving a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Take the next digit (8) from the dividend and append it to 2, then repeat: 28 / 84

Moving on to step 2:
28 divided by 84 is 0 with a remainder of 28.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 28 leaves us with 28.
Take the next digit (0) from the dividend and append it to 28, then repeat: 280 / 84

Moving on to step 3:
When dividing 280 by 84, we get 3 with a remainder of 28.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Deduct 252 from 280 and we're left with 28.
Fetch the next digit (8) from the dividend, attach it to 28 and continue: 288 / 84

Moving on to step 4:
84 goes into 288 3 times with a remainder of 36.
Write down 3 as next digit of the result. 
Result so far: 33.0
If we subtract 252 from 288, we get 36.
Append the next digit (1) from the dividend to 36 and continue with: 361 / 84

On to step 5:
When dividing 361 by 84, we get 4 with a remainder of 25.
The next digit of our result is 4. 
Result so far: 334.0
The remainder is 25 after subtracting 336 from 361.
Append the next digit (7) from the dividend to 25 and continue with: 257 / 84

Moving on to step 6:
The number 84 fits into 257 3 times, leaving a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 3343.0
If we subtract 252 from 257, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 7:
50 divided by 84 is 0 with a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 3343.0
If we take 0 away from 50, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 8:
The number 84 fits into 500 5 times, leaving a remainder of 80.
Put 5 as the next digit of the answer. 
Result so far: 3343.05
Deduct 420 from 500 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 9:
The number 84 fits into 800 9 times, leaving a remainder of 44.
Write down 9 as next digit of the result. 
Result so far: 3343.059
Deduct 756 from 800 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Advancing to step 10:
If we divide 440 by 84, we get 5 and a remainder of 20.
Record the quotient 5 as the next digit in the result. 
Result so far: 3343.0595
Subtract 420 from 440 to get 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 11:
When dividing 200 by 84, we get 2 with a remainder of 32.
Record the quotient 2 as the next digit in the result. 
Result so far: 3343.05952
Subtract 168 from 200 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 12:
When dividing 320 by 84, we get 3 with a remainder of 68.
The number 3 becomes the next digit in our result. 
Result so far: 3343.059523
Subtracting 252 from 320 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Advancing to step 13:
84 goes into 680 8 times with a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 3343.0595238
If we take 672 away from 680, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 14:
84 can be fit into 80 0 times, resulting in a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 3343.0595238
Subtract 0 from 80 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

In conclusion, the division gives 3343.0595238 with a balance of 8e-08.