Let's divide 450802 by 3
The aim is to understand the frequency of 3 in 450802.

On to step 1:
4 divided by 3 is 1 with a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 3 away from 4, we end up with 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 3

Advancing to step 2:
3 can be fit into 15 5 times, resulting in a remainder of 0.
The next digit of our result is 5. 
Result so far: 15.0
Deduct 15 from 15 and we're left with 0.
Take the next digit (0) from the dividend and append it to 0, then repeat: 0 / 3

On to step 3:
0 divided by 3 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 150.0
The remainder is 0 after subtracting 0 from 0.
Bring next digit (8) of the dividend behind the 0 and repeat the process: 8 / 3

Advancing to step 4:
3 goes into 8 2 times with a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 1502.0
Subtract 6 from 8 to get 2.
Append the next digit (0) from the dividend to 2 and continue with: 20 / 3

Moving on to step 5:
20 divided by 3 is 6 with a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 15026.0
Subtracting 18 from 20 leaves us with 2.
Bring next digit (2) of the dividend behind the 2 and repeat the process: 22 / 3

On to step 6:
3 goes into 22 7 times with a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 150267.0
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.

Let's proceed to step 7:
When dividing 10 by 3, we get 3 with a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 150267.3
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.

Step 8:
If we divide 10 by 3, we get 3 and a remainder of 1.
The next digit of our result is 3. 
Result so far: 150267.33
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 quotient of the division is 150267.33, and the remainder is 0.001.