We're dividing 623203 by 84 
The aim is to understand the frequency of 84 in 623203.

On to step 1:
6 divided by 84 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (2) from the dividend after 6, then repeat: 62 / 84

Moving on to step 2:
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: 0.0
The remainder is 62 after subtracting 0 from 62.
Take the next digit (3) from the dividend and append it to 62, then repeat: 623 / 84

Moving on to step 3:
84 can be fit into 623 7 times, resulting in a remainder of 35.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Deduct 588 from 623 and we're left with 35.
Bring next digit (2) of the dividend behind the 35 and repeat the process: 352 / 84

Let's proceed to step 4:
When dividing 352 by 84, we get 4 with a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 74.0
If we subtract 336 from 352, we get 16.
Grab the next digit (0) from the dividend, add it to 16, then carry on: 160 / 84

Moving on to step 5:
The number 84 fits into 160 1 times, leaving a remainder of 76.
Record the quotient 1 as the next digit in the result. 
Result so far: 741.0
Subtracting 84 from 160 leaves us with 76.
Include the next digit (3) from the dividend after 76, then repeat: 763 / 84

Advancing to step 6:
84 can be fit into 763 9 times, resulting in a remainder of 7.
The number 9 becomes the next digit in our result. 
Result so far: 7419.0
Subtract 756 from 763 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 7:
If we divide 70 by 84, we get 0 and a remainder of 70.
Record the quotient 0 as the next digit in the result. 
Result so far: 7419.0
The remainder is 70 after subtracting 0 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 8:
When dividing 700 by 84, we get 8 with a remainder of 28.
Write down 8 as next digit of the result. 
Result so far: 7419.08
The remainder is 28 after subtracting 672 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 9:
84 goes into 280 3 times with a remainder of 28.
Use 3 as the next digit of our solution. 
Result so far: 7419.083
If we take 252 away from 280, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 10:
84 can be fit into 280 3 times, resulting in a remainder of 28.
Use 3 as the next digit of our solution. 
Result so far: 7419.0833
Subtracting 252 from 280 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

After the division, we end up with 7419.0833 and a remainder of 0.00028.