We look at the division of 90672 by 84 
The aim is to understand the frequency of 84 in 90672.

On to step 1:
If we divide 9 by 84, we get 0 and a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 84

Going ahead to step 2:
When dividing 90 by 84, we get 1 with a remainder of 6.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 6 after subtracting 84 from 90.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 84

Moving on to step 3:
66 divided by 84 is 0 with a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 10.0
The remainder is 66 after subtracting 0 from 66.
Include the next digit (7) from the dividend after 66, then repeat: 667 / 84

On to step 4:
When dividing 667 by 84, we get 7 with a remainder of 79.
Put 7 as the next digit of the answer. 
Result so far: 107.0
Deduct 588 from 667 and we're left with 79.
Fetch the next digit (2) from the dividend, attach it to 79 and continue: 792 / 84

Moving on to step 5:
If we divide 792 by 84, we get 9 and a remainder of 36.
Write down 9 as next digit of the result. 
Result so far: 1079.0
Deduct 756 from 792 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 6:
If we divide 360 by 84, we get 4 and a remainder of 24.
The next digit of our result is 4. 
Result so far: 1079.4
The remainder is 24 after subtracting 336 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 7:
240 divided by 84 is 2 with a remainder of 72.
Use 2 as the next digit of our solution. 
Result so far: 1079.42
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.

Going ahead to step 8:
84 can be fit into 720 8 times, resulting in a remainder of 48.
Record the quotient 8 as the next digit in the result. 
Result so far: 1079.428
If we take 672 away from 720, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 9:
The number 84 fits into 480 5 times, leaving a remainder of 60.
Record the quotient 5 as the next digit in the result. 
Result so far: 1079.4285
If we subtract 420 from 480, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 10:
84 goes into 600 7 times with a remainder of 12.
The number 7 becomes the next digit in our result. 
Result so far: 1079.42857
Subtract 588 from 600 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 11:
If we divide 120 by 84, we get 1 and a remainder of 36.
Put 1 as the next digit of the answer. 
Result so far: 1079.428571
The remainder is 36 after subtracting 84 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 12:
360 divided by 84 is 4 with a remainder of 24.
The number 4 becomes the next digit in our result. 
Result so far: 1079.4285714
Deduct 336 from 360 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 13:
If we divide 240 by 84, we get 2 and a remainder of 72.
The next digit of our result is 2. 
Result so far: 1079.42857142
The remainder is 72 after subtracting 168 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

The quotient of the division is 1079.42857142, and the remainder is 7.2e-08.