We look at the division of 451181 by 3 
The aim is to understand the frequency of 3 in 451181.

Going ahead to step 1:
4 divided by 3 is 1 with a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 3 from 4 leaves us with 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 3

Step 2:
When dividing 15 by 3, we get 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
If we subtract 15 from 15, we get 0.
Fetch the next digit (1) from the dividend, attach it to 0 and continue: 1 / 3

Moving on to step 3:
3 can be fit into 1 0 times, resulting in a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 150.0
If we take 0 away from 1, we end up with 1.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 3

Moving on to step 4:
11 divided by 3 is 3 with a remainder of 2.
The next digit of our result is 3. 
Result so far: 1503.0
Subtract 9 from 11 to get 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 3

Step 5:
3 can be fit into 28 9 times, resulting in a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 15039.0
If we take 27 away from 28, we end up with 1.
Include the next digit (1) from the dividend after 1, then repeat: 11 / 3

Moving on to step 6:
When dividing 11 by 3, we get 3 with a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 150393.0
Deduct 9 from 11 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.

Step 7:
If we divide 20 by 3, we get 6 and a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 150393.6
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.

Going ahead to step 8:
When dividing 20 by 3, we get 6 with a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 150393.66
Subtracting 18 from 20 leaves us 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.

The final result is 150393.66 with a remainder of 0.002.