We look at the division of 243355 by 3 
The aim is to understand the frequency of 3 in 243355.

Let's proceed to step 1:
3 can be fit into 2 0 times, resulting in a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Include the next digit (4) from the dividend after 2, then repeat: 24 / 3

Moving on to step 2:
The number 3 fits into 24 8 times, leaving a remainder of 0.
The next digit of our result is 8. 
Result so far: 8.0
Deduct 24 from 24 and we're left with 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 3

Step 3:
If we divide 3 by 3, we get 1 and a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 81.0
The remainder is 0 after subtracting 3 from 3.
Bring next digit (3) of the dividend behind the 0 and repeat the process: 3 / 3

Moving on to step 4:
3 can be fit into 3 1 times, resulting in a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 811.0
Subtracting 3 from 3 leaves us with 0.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 3

Let's proceed to step 5:
When dividing 5 by 3, we get 1 with a remainder of 2.
The next digit of our result is 1. 
Result so far: 8111.0
The remainder is 2 after subtracting 3 from 5.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 3

Step 6:
25 divided by 3 is 8 with a remainder of 1.
Put 8 as the next digit of the answer. 
Result so far: 81118.0
If we take 24 away from 25, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 7:
If we divide 10 by 3, we get 3 and a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 81118.3
Subtracting 9 from 10 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 8:
The number 3 fits into 10 3 times, leaving a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 81118.33
Deduct 9 from 10 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final outcome is 81118.33, with a leftover of 0.001.