We divide 456374 by 3
The aim is to understand the frequency of 3 in 456374.

Moving on to step 1:
4 divided by 3 is 1 with a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 3 from 4 to get 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 3

Step 2:
If we divide 15 by 3, we get 5 and a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 15.0
Subtracting 15 from 15 leaves us with 0.
Append the next digit (6) from the dividend to 0 and continue with: 6 / 3

On to step 3:
If we divide 6 by 3, we get 2 and a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 152.0
Subtracting 6 from 6 leaves us with 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 3

Going ahead to step 4:
If we divide 3 by 3, we get 1 and a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1521.0
If we take 3 away from 3, we end up with 0.
Bring next digit (7) of the dividend behind the 0 and repeat the process: 7 / 3

Step 5:
7 divided by 3 is 2 with a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 15212.0
If we take 6 away from 7, we end up with 1.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 3

Going ahead to step 6:
When dividing 14 by 3, we get 4 with a remainder of 2.
The next digit of our result is 4. 
Result so far: 152124.0
Deduct 12 from 14 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 7:
If we divide 20 by 3, we get 6 and a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 152124.6
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:
The number 3 fits into 20 6 times, leaving a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 152124.66
If we take 18 away from 20, 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.

After the division, we end up with 152124.66 and a remainder of 0.002.