We divide 443585 by 3
The aim is to understand the frequency of 3 in 443585.

On to 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
The remainder is 1 after subtracting 3 from 4.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 3

Going ahead to step 2:
The number 3 fits into 14 4 times, leaving a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 14.0
If we take 12 away from 14, we end up with 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 3

Step 3:
23 divided by 3 is 7 with a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 147.0
The remainder is 2 after subtracting 21 from 23.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 3

Moving on to step 4:
If we divide 25 by 3, we get 8 and a remainder of 1.
Write down 8 as next digit of the result. 
Result so far: 1478.0
The remainder is 1 after subtracting 24 from 25.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 3

Let's proceed to step 5:
The number 3 fits into 18 6 times, leaving a remainder of 0.
Use 6 as the next digit of our solution. 
Result so far: 14786.0
If we subtract 18 from 18, we get 0.
Grab the next digit (5) from the dividend, add it to 0, then carry on: 5 / 3

Step 6:
3 goes into 5 1 times with a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 147861.0
If we take 3 away from 5, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 7:
3 can be fit into 20 6 times, resulting in a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 147861.6
Deduct 18 from 20 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 8:
When dividing 20 by 3, we get 6 with a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 147861.66
The remainder is 2 after subtracting 18 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final result is 147861.66 with a remainder of 0.002.