We're dividing 448783 by 3 
The aim is to understand the frequency of 3 in 448783.

Going ahead to step 1:
The number 3 fits into 4 1 times, leaving 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.
Grab the next digit (4) from the dividend, add it to 1, then carry on: 14 / 3

Let's proceed to step 2:
3 goes into 14 4 times with a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
Subtract 12 from 14 to get 2.
Bring next digit (8) of the dividend behind the 2 and repeat the process: 28 / 3

Advancing to step 3:
28 divided by 3 is 9 with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 149.0
If we subtract 27 from 28, we get 1.
Grab the next digit (7) from the dividend, add it to 1, then carry on: 17 / 3

On to step 4:
The number 3 fits into 17 5 times, leaving a remainder of 2.
The number 5 becomes the next digit in our result. 
Result so far: 1495.0
The remainder is 2 after subtracting 15 from 17.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 3

Let's proceed to step 5:
The number 3 fits into 28 9 times, leaving a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 14959.0
If we take 27 away from 28, we end up with 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 3

Advancing to step 6:
The number 3 fits into 13 4 times, leaving a remainder of 1.
Record the quotient 4 as the next digit in the result. 
Result so far: 149594.0
If we subtract 12 from 13, we 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.

Step 7:
10 divided by 3 is 3 with a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 149594.3
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.

Advancing to step 8:
When dividing 10 by 3, we get 3 with a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 149594.33
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.

After the division, we end up with 149594.33 and a remainder of 0.001.