We look at the division of 678243 by 84 
The aim is to understand the frequency of 84 in 678243.

Step 1:
84 can be fit into 6 0 times, resulting in a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (7) from the dividend after 6, then repeat: 67 / 84

Step 2:
84 can be fit into 67 0 times, resulting in a remainder of 67.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 67, we get 67.
Take the next digit (8) from the dividend and append it to 67, then repeat: 678 / 84

Going ahead to step 3:
If we divide 678 by 84, we get 8 and a remainder of 6.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we subtract 672 from 678, we get 6.
Include the next digit (2) from the dividend after 6, then repeat: 62 / 84

Let's proceed to step 4:
If we divide 62 by 84, we get 0 and a remainder of 62.
Record the quotient 0 as the next digit in the result. 
Result so far: 80.0
The remainder is 62 after subtracting 0 from 62.
Bring next digit (4) of the dividend behind the 62 and repeat the process: 624 / 84

Let's proceed to step 5:
When dividing 624 by 84, we get 7 with a remainder of 36.
Write down 7 as next digit of the result. 
Result so far: 807.0
The remainder is 36 after subtracting 588 from 624.
Bring next digit (3) of the dividend behind the 36 and repeat the process: 363 / 84

Let's proceed to step 6:
84 can be fit into 363 4 times, resulting in a remainder of 27.
Record the quotient 4 as the next digit in the result. 
Result so far: 8074.0
If we subtract 336 from 363, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 7:
270 divided by 84 is 3 with a remainder of 18.
The next digit of our result is 3. 
Result so far: 8074.3
The remainder is 18 after subtracting 252 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 8:
84 goes into 180 2 times with a remainder of 12.
Put 2 as the next digit of the answer. 
Result so far: 8074.32
Subtracting 168 from 180 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 9:
If we divide 120 by 84, we get 1 and a remainder of 36.
Record the quotient 1 as the next digit in the result. 
Result so far: 8074.321
Subtracting 84 from 120 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 10:
If we divide 360 by 84, we get 4 and a remainder of 24.
Write down 4 as next digit of the result. 
Result so far: 8074.3214
The remainder is 24 after subtracting 336 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 11:
84 can be fit into 240 2 times, resulting in a remainder of 72.
Write down 2 as next digit of the result. 
Result so far: 8074.32142
If we take 168 away from 240, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Step 12:
720 divided by 84 is 8 with a remainder of 48.
Write down 8 as next digit of the result. 
Result so far: 8074.321428
If we take 672 away from 720, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 13:
84 can be fit into 480 5 times, resulting in a remainder of 60.
Write down 5 as next digit of the result. 
Result so far: 8074.3214285
Subtract 420 from 480 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 14:
If we divide 600 by 84, we get 7 and a remainder of 12.
Use 7 as the next digit of our solution. 
Result so far: 8074.32142857
Subtract 588 from 600 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

In conclusion, the division gives 8074.32142857 with a balance of 1.2e-08.