We're dividing 405703 by 84 
The aim is to understand the frequency of 84 in 405703.

Going ahead to step 1:
When dividing 4 by 84, we get 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 84

Step 2:
If we divide 40 by 84, we get 0 and a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 40 and we're left with 40.
Append the next digit (5) from the dividend to 40 and continue with: 405 / 84

Advancing to step 3:
When dividing 405 by 84, we get 4 with a remainder of 69.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtracting 336 from 405 leaves us with 69.
Fetch the next digit (7) from the dividend, attach it to 69 and continue: 697 / 84

Advancing to step 4:
84 goes into 697 8 times with a remainder of 25.
The next digit of our result is 8. 
Result so far: 48.0
The remainder is 25 after subtracting 672 from 697.
Grab the next digit (0) from the dividend, add it to 25, then carry on: 250 / 84

Step 5:
When dividing 250 by 84, we get 2 with a remainder of 82.
Put 2 as the next digit of the answer. 
Result so far: 482.0
If we subtract 168 from 250, we get 82.
Bring next digit (3) of the dividend behind the 82 and repeat the process: 823 / 84

Moving on to step 6:
If we divide 823 by 84, we get 9 and a remainder of 67.
Record the quotient 9 as the next digit in the result. 
Result so far: 4829.0
The remainder is 67 after subtracting 756 from 823.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Step 7:
84 goes into 670 7 times with a remainder of 82.
Write down 7 as next digit of the result. 
Result so far: 4829.7
If we take 588 away from 670, we end up with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Let's proceed to step 8:
820 divided by 84 is 9 with a remainder of 64.
Write down 9 as next digit of the result. 
Result so far: 4829.79
If we take 756 away from 820, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 9:
When dividing 640 by 84, we get 7 with a remainder of 52.
Use 7 as the next digit of our solution. 
Result so far: 4829.797
If we subtract 588 from 640, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 10:
The number 84 fits into 520 6 times, leaving a remainder of 16.
Put 6 as the next digit of the answer. 
Result so far: 4829.7976
The remainder is 16 after subtracting 504 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 11:
When dividing 160 by 84, we get 1 with a remainder of 76.
The number 1 becomes the next digit in our result. 
Result so far: 4829.79761
Deduct 84 from 160 and we're left with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Moving on to step 12:
The number 84 fits into 760 9 times, leaving a remainder of 4.
Put 9 as the next digit of the answer. 
Result so far: 4829.797619
Deduct 756 from 760 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 13:
84 can be fit into 40 0 times, resulting in a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 4829.797619
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 14:
The number 84 fits into 400 4 times, leaving a remainder of 64.
Put 4 as the next digit of the answer. 
Result so far: 4829.79761904
Subtract 336 from 400 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

The final outcome is 4829.79761904, with a leftover of 6.4e-08.