Let's divide 869000 by 84
The aim is to understand the frequency of 84 in 869000.

Advancing to step 1:
84 can be fit into 8 0 times, resulting in a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 84

Step 2:
When dividing 86 by 84, we get 1 with a remainder of 2.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 84 from 86 leaves us with 2.
Append the next digit (9) from the dividend to 2 and continue with: 29 / 84

Going ahead to step 3:
When dividing 29 by 84, we get 0 with a remainder of 29.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we take 0 away from 29, we end up with 29.
Grab the next digit (0) from the dividend, add it to 29, then carry on: 290 / 84

On to step 4:
84 goes into 290 3 times with a remainder of 38.
Record the quotient 3 as the next digit in the result. 
Result so far: 103.0
Subtracting 252 from 290 leaves us with 38.
Include the next digit (0) from the dividend after 38, then repeat: 380 / 84

Step 5:
If we divide 380 by 84, we get 4 and a remainder of 44.
Record the quotient 4 as the next digit in the result. 
Result so far: 1034.0
The remainder is 44 after subtracting 336 from 380.
Grab the next digit (0) from the dividend, add it to 44, then carry on: 440 / 84

Advancing to step 6:
440 divided by 84 is 5 with a remainder of 20.
The number 5 becomes the next digit in our result. 
Result so far: 10345.0
The remainder is 20 after subtracting 420 from 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 7:
200 divided by 84 is 2 with a remainder of 32.
The number 2 becomes the next digit in our result. 
Result so far: 10345.2
The remainder is 32 after subtracting 168 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 8:
The number 84 fits into 320 3 times, leaving a remainder of 68.
Use 3 as the next digit of our solution. 
Result so far: 10345.23
The remainder is 68 after subtracting 252 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Moving on to step 9:
When dividing 680 by 84, we get 8 with a remainder of 8.
Put 8 as the next digit of the answer. 
Result so far: 10345.238
The remainder is 8 after subtracting 672 from 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 10:
If we divide 80 by 84, we get 0 and a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 10345.238
Deduct 0 from 80 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 11:
84 goes into 800 9 times with a remainder of 44.
Put 9 as the next digit of the answer. 
Result so far: 10345.23809
If we subtract 756 from 800, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 12:
440 divided by 84 is 5 with a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 10345.238095
Deduct 420 from 440 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 13:
84 goes into 200 2 times with a remainder of 32.
Write down 2 as next digit of the result. 
Result so far: 10345.2380952
Subtract 168 from 200 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 14:
If we divide 320 by 84, we get 3 and a remainder of 68.
The next digit of our result is 3. 
Result so far: 10345.23809523
If we take 252 away from 320, we end up with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

The final result is 10345.23809523 with a remainder of 6.8e-08.