630405 ÷ 84 
The aim is to understand the frequency of 84 in 630405.

Going ahead to step 1:
84 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 84

On to step 2:
84 goes into 63 0 times with a remainder of 63.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 63, we get 63.
Bring next digit (0) of the dividend behind the 63 and repeat the process: 630 / 84

Moving on to step 3:
If we divide 630 by 84, we get 7 and a remainder of 42.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
The remainder is 42 after subtracting 588 from 630.
Bring next digit (4) of the dividend behind the 42 and repeat the process: 424 / 84

Going ahead to step 4:
The number 84 fits into 424 5 times, leaving a remainder of 4.
The next digit of our result is 5. 
Result so far: 75.0
Deduct 420 from 424 and we're left with 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 84

Moving on to step 5:
84 goes into 40 0 times with a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 750.0
If we take 0 away from 40, we end up with 40.
Fetch the next digit (5) from the dividend, attach it to 40 and continue: 405 / 84

On to step 6:
84 can be fit into 405 4 times, resulting in a remainder of 69.
Record the quotient 4 as the next digit in the result. 
Result so far: 7504.0
Subtracting 336 from 405 leaves us with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Step 7:
84 can be fit into 690 8 times, resulting in a remainder of 18.
The next digit of our result is 8. 
Result so far: 7504.8
The remainder is 18 after subtracting 672 from 690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 8:
The number 84 fits into 180 2 times, leaving a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 7504.82
Subtract 168 from 180 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.

Let's proceed to step 9:
120 divided by 84 is 1 with a remainder of 36.
The next digit of our result is 1. 
Result so far: 7504.821
Deduct 84 from 120 and we're left 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:
84 goes into 360 4 times with a remainder of 24.
Record the quotient 4 as the next digit in the result. 
Result so far: 7504.8214
If we take 336 away from 360, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 11:
The number 84 fits into 240 2 times, leaving a remainder of 72.
The next digit of our result is 2. 
Result so far: 7504.82142
If we subtract 168 from 240, we get 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:
84 can be fit into 720 8 times, resulting in a remainder of 48.
Use 8 as the next digit of our solution. 
Result so far: 7504.821428
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.

On to step 13:
84 goes into 480 5 times with a remainder of 60.
Write down 5 as next digit of the result. 
Result so far: 7504.8214285
Deduct 420 from 480 and we're left 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.

Let's proceed to step 14:
600 divided by 84 is 7 with a remainder of 12.
The number 7 becomes the next digit in our result. 
Result so far: 7504.82142857
If we subtract 588 from 600, we 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.

The final outcome is 7504.82142857, with a leftover of 1.2e-08.