We're dividing 649645 by 84 
The aim is to understand the frequency of 84 in 649645.

Step 1:
If we divide 6 by 84, we get 0 and a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 84

Let's proceed to step 2:
84 can be fit into 64 0 times, resulting in a remainder of 64.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Include the next digit (9) from the dividend after 64, then repeat: 649 / 84

Let's proceed to step 3:
649 divided by 84 is 7 with a remainder of 61.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Deduct 588 from 649 and we're left with 61.
Include the next digit (6) from the dividend after 61, then repeat: 616 / 84

Moving on to step 4:
When dividing 616 by 84, we get 7 with a remainder of 28.
The number 7 becomes the next digit in our result. 
Result so far: 77.0
Subtract 588 from 616 to get 28.
Include the next digit (4) from the dividend after 28, then repeat: 284 / 84

Advancing to step 5:
84 can be fit into 284 3 times, resulting in a remainder of 32.
Record the quotient 3 as the next digit in the result. 
Result so far: 773.0
The remainder is 32 after subtracting 252 from 284.
Bring next digit (5) of the dividend behind the 32 and repeat the process: 325 / 84

Moving on to step 6:
325 divided by 84 is 3 with a remainder of 73.
Put 3 as the next digit of the answer. 
Result so far: 7733.0
Subtract 252 from 325 to get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Step 7:
If we divide 730 by 84, we get 8 and a remainder of 58.
Use 8 as the next digit of our solution. 
Result so far: 7733.8
If we subtract 672 from 730, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 8:
If we divide 580 by 84, we get 6 and a remainder of 76.
Record the quotient 6 as the next digit in the result. 
Result so far: 7733.86
If we subtract 504 from 580, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Advancing to step 9:
The number 84 fits into 760 9 times, leaving a remainder of 4.
The next digit of our result is 9. 
Result so far: 7733.869
Subtract 756 from 760 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 10:
When dividing 40 by 84, we get 0 with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 7733.869
Deduct 0 from 40 and we're left 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.

Advancing to step 11:
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: 7733.86904
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.

Moving on to step 12:
84 goes into 640 7 times with a remainder of 52.
The next digit of our result is 7. 
Result so far: 7733.869047
Subtracting 588 from 640 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 13:
84 can be fit into 520 6 times, resulting in a remainder of 16.
Record the quotient 6 as the next digit in the result. 
Result so far: 7733.8690476
If we subtract 504 from 520, we get 16.
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 14:
84 can be fit into 160 1 times, resulting in a remainder of 76.
The number 1 becomes the next digit in our result. 
Result so far: 7733.86904761
Subtracting 84 from 160 leaves us 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.

The quotient of the division is 7733.86904761, and the remainder is 7.6e-08.