Let's divide 573509 by 84
The aim is to understand the frequency of 84 in 573509.

On to step 1:
84 goes into 5 0 times with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 84

Let's proceed to step 2:
84 can be fit into 57 0 times, resulting in a remainder of 57.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 57 and we're left with 57.
Take the next digit (3) from the dividend and append it to 57, then repeat: 573 / 84

Moving on to step 3:
84 goes into 573 6 times with a remainder of 69.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Subtract 504 from 573 to get 69.
Grab the next digit (5) from the dividend, add it to 69, then carry on: 695 / 84

Step 4:
84 goes into 695 8 times with a remainder of 23.
The number 8 becomes the next digit in our result. 
Result so far: 68.0
The remainder is 23 after subtracting 672 from 695.
Grab the next digit (0) from the dividend, add it to 23, then carry on: 230 / 84

Moving on to step 5:
If we divide 230 by 84, we get 2 and a remainder of 62.
Record the quotient 2 as the next digit in the result. 
Result so far: 682.0
Subtracting 168 from 230 leaves us with 62.
Append the next digit (9) from the dividend to 62 and continue with: 629 / 84

On to step 6:
The number 84 fits into 629 7 times, leaving a remainder of 41.
The next digit of our result is 7. 
Result so far: 6827.0
If we take 588 away from 629, we end up with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Moving on to step 7:
84 can be fit into 410 4 times, resulting in a remainder of 74.
Use 4 as the next digit of our solution. 
Result so far: 6827.4
Subtracting 336 from 410 leaves us 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.

On to step 8:
740 divided by 84 is 8 with a remainder of 68.
Record the quotient 8 as the next digit in the result. 
Result so far: 6827.48
If we subtract 672 from 740, we get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Step 9:
When dividing 680 by 84, we get 8 with a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 6827.488
Subtracting 672 from 680 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final outcome is 6827.488, with a leftover of 0.0008.