538169 ÷ 84 
The aim is to understand the frequency of 84 in 538169.

Step 1:
If we divide 5 by 84, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Bring next digit (3) of the dividend behind the 5 and repeat the process: 53 / 84

Going ahead to step 2:
84 can be fit into 53 0 times, resulting in a remainder of 53.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 53 to get 53.
Grab the next digit (8) from the dividend, add it to 53, then carry on: 538 / 84

Moving on to step 3:
When dividing 538 by 84, we get 6 with a remainder of 34.
Use 6 as the next digit of our solution. 
Result so far: 6.0
If we subtract 504 from 538, we get 34.
Take the next digit (1) from the dividend and append it to 34, then repeat: 341 / 84

Going ahead to step 4:
The number 84 fits into 341 4 times, leaving a remainder of 5.
Record the quotient 4 as the next digit in the result. 
Result so far: 64.0
If we take 336 away from 341, we end up with 5.
Include the next digit (6) from the dividend after 5, then repeat: 56 / 84

Going ahead to step 5:
56 divided by 84 is 0 with a remainder of 56.
Record the quotient 0 as the next digit in the result. 
Result so far: 640.0
If we take 0 away from 56, we end up with 56.
Bring next digit (9) of the dividend behind the 56 and repeat the process: 569 / 84

Let's proceed to step 6:
If we divide 569 by 84, we get 6 and a remainder of 65.
Put 6 as the next digit of the answer. 
Result so far: 6406.0
If we take 504 away from 569, we end up with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Advancing to step 7:
The number 84 fits into 650 7 times, leaving a remainder of 62.
The number 7 becomes the next digit in our result. 
Result so far: 6406.7
Deduct 588 from 650 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Going ahead to step 8:
620 divided by 84 is 7 with a remainder of 32.
Put 7 as the next digit of the answer. 
Result so far: 6406.77
If we take 588 away from 620, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The final result is 6406.77 with a remainder of 0.032.