Let's divide 439732 by 3
The aim is to understand the frequency of 3 in 439732.

Step 1:
3 goes into 4 1 times with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 3 from 4 and we're left with 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 3

Moving on to step 2:
3 can be fit into 13 4 times, resulting in a remainder of 1.
The next digit of our result is 4. 
Result so far: 14.0
Deduct 12 from 13 and we're left with 1.
Append the next digit (9) from the dividend to 1 and continue with: 19 / 3

Step 3:
3 goes into 19 6 times with a remainder of 1.
Record the quotient 6 as the next digit in the result. 
Result so far: 146.0
The remainder is 1 after subtracting 18 from 19.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 3

Going ahead to step 4:
3 goes into 17 5 times with a remainder of 2.
Write down 5 as next digit of the result. 
Result so far: 1465.0
If we take 15 away from 17, we end up with 2.
Grab the next digit (3) from the dividend, add it to 2, then carry on: 23 / 3

Moving on to step 5:
The number 3 fits into 23 7 times, leaving a remainder of 2.
Put 7 as the next digit of the answer. 
Result so far: 14657.0
The remainder is 2 after subtracting 21 from 23.
Include the next digit (2) from the dividend after 2, then repeat: 22 / 3

Let's proceed to step 6:
The number 3 fits into 22 7 times, leaving a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 146577.0
Deduct 21 from 22 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.

On to step 7:
The number 3 fits into 10 3 times, leaving a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 146577.3
Subtract 9 from 10 to get 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:
3 goes into 10 3 times with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 146577.33
The remainder is 1 after subtracting 9 from 10.
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 146577.33, with a leftover of 0.001.