We're dividing 213863 by 84 
The aim is to understand the frequency of 84 in 213863.

Let's proceed to step 1:
If we divide 2 by 84, we get 0 and 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.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 84

Let's proceed to step 2:
The number 84 fits into 21 0 times, leaving a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Take the next digit (3) from the dividend and append it to 21, then repeat: 213 / 84

Step 3:
213 divided by 84 is 2 with a remainder of 45.
The next digit of our result is 2. 
Result so far: 2.0
If we take 168 away from 213, we end up with 45.
Fetch the next digit (8) from the dividend, attach it to 45 and continue: 458 / 84

Let's proceed to step 4:
458 divided by 84 is 5 with a remainder of 38.
Use 5 as the next digit of our solution. 
Result so far: 25.0
Deduct 420 from 458 and we're left with 38.
Include the next digit (6) from the dividend after 38, then repeat: 386 / 84

Advancing to step 5:
If we divide 386 by 84, we get 4 and a remainder of 50.
Use 4 as the next digit of our solution. 
Result so far: 254.0
The remainder is 50 after subtracting 336 from 386.
Append the next digit (3) from the dividend to 50 and continue with: 503 / 84

Let's proceed to step 6:
When dividing 503 by 84, we get 5 with a remainder of 83.
Use 5 as the next digit of our solution. 
Result so far: 2545.0
The remainder is 83 after subtracting 420 from 503.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Moving on to step 7:
If we divide 830 by 84, we get 9 and a remainder of 74.
Put 9 as the next digit of the answer. 
Result so far: 2545.9
If we take 756 away from 830, we end up with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 8:
If we divide 740 by 84, we get 8 and a remainder of 68.
The next digit of our result is 8. 
Result so far: 2545.98
Subtracting 672 from 740 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.

Moving on to step 9:
If we divide 680 by 84, we get 8 and a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 2545.988
The remainder is 8 after subtracting 672 from 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

In conclusion, the division gives 2545.988 with a balance of 0.0008.