We're dividing 743138 by 84 
The aim is to understand the frequency of 84 in 743138.

Let's proceed to step 1:
If we divide 7 by 84, we get 0 and a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Include the next digit (4) from the dividend after 7, then repeat: 74 / 84

On to step 2:
84 goes into 74 0 times with a remainder of 74.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 74, we end up with 74.
Fetch the next digit (3) from the dividend, attach it to 74 and continue: 743 / 84

Step 3:
If we divide 743 by 84, we get 8 and a remainder of 71.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Subtracting 672 from 743 leaves us with 71.
Fetch the next digit (1) from the dividend, attach it to 71 and continue: 711 / 84

Advancing to step 4:
When dividing 711 by 84, we get 8 with a remainder of 39.
The next digit of our result is 8. 
Result so far: 88.0
Deduct 672 from 711 and we're left with 39.
Bring next digit (3) of the dividend behind the 39 and repeat the process: 393 / 84

Advancing to step 5:
If we divide 393 by 84, we get 4 and a remainder of 57.
Write down 4 as next digit of the result. 
Result so far: 884.0
Subtract 336 from 393 to get 57.
Append the next digit (8) from the dividend to 57 and continue with: 578 / 84

Advancing to step 6:
84 goes into 578 6 times with a remainder of 74.
Record the quotient 6 as the next digit in the result. 
Result so far: 8846.0
Deduct 504 from 578 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

On to step 7:
84 goes into 740 8 times with a remainder of 68.
Write down 8 as next digit of the result. 
Result so far: 8846.8
Subtract 672 from 740 to get 68.
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 8:
If we divide 680 by 84, we get 8 and a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 8846.88
Subtract 672 from 680 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Our division results in 8846.88 with a remaining 0.008.