921909 divided by 84 
The aim is to understand the frequency of 84 in 921909.

Advancing to step 1:
The number 84 fits into 9 0 times, leaving a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (2) from the dividend to 9 and continue with: 92 / 84

Going ahead to step 2:
84 goes into 92 1 times with a remainder of 8.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 8 after subtracting 84 from 92.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 84

On to step 3:
The number 84 fits into 81 0 times, leaving a remainder of 81.
Write down 0 as next digit of the result. 
Result so far: 10.0
If we take 0 away from 81, we end up with 81.
Include the next digit (9) from the dividend after 81, then repeat: 819 / 84

Advancing to step 4:
The number 84 fits into 819 9 times, leaving a remainder of 63.
Put 9 as the next digit of the answer. 
Result so far: 109.0
Subtract 756 from 819 to get 63.
Fetch the next digit (0) from the dividend, attach it to 63 and continue: 630 / 84

Advancing to step 5:
The number 84 fits into 630 7 times, leaving a remainder of 42.
Put 7 as the next digit of the answer. 
Result so far: 1097.0
If we subtract 588 from 630, we get 42.
Grab the next digit (9) from the dividend, add it to 42, then carry on: 429 / 84

Step 6:
The number 84 fits into 429 5 times, leaving a remainder of 9.
Use 5 as the next digit of our solution. 
Result so far: 10975.0
If we subtract 420 from 429, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 7:
If we divide 90 by 84, we get 1 and a remainder of 6.
The next digit of our result is 1. 
Result so far: 10975.1
Subtract 84 from 90 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 8:
60 divided by 84 is 0 with a remainder of 60.
The next digit of our result is 0. 
Result so far: 10975.1
Deduct 0 from 60 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.

Step 9:
When dividing 600 by 84, we get 7 with a remainder of 12.
Write down 7 as next digit of the result. 
Result so far: 10975.107
The remainder is 12 after subtracting 588 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 10:
84 can be fit into 120 1 times, resulting in a remainder of 36.
Record the quotient 1 as the next digit in the result. 
Result so far: 10975.1071
If we subtract 84 from 120, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 11:
360 divided by 84 is 4 with a remainder of 24.
Record the quotient 4 as the next digit in the result. 
Result so far: 10975.10714
If we subtract 336 from 360, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 12:
84 goes into 240 2 times with a remainder of 72.
The next digit of our result is 2. 
Result so far: 10975.107142
Subtracting 168 from 240 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Moving on to step 13:
The number 84 fits into 720 8 times, leaving a remainder of 48.
The number 8 becomes the next digit in our result. 
Result so far: 10975.1071428
If we subtract 672 from 720, we get 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 14:
The number 84 fits into 480 5 times, leaving a remainder of 60.
Write down 5 as next digit of the result. 
Result so far: 10975.10714285
The remainder is 60 after subtracting 420 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

The final outcome is 10975.10714285, with a leftover of 6e-08.