664199 ÷ 3 
The aim is to understand the frequency of 3 in 664199.

Going ahead to step 1:
The number 3 fits into 6 2 times, leaving a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we subtract 6 from 6, we get 0.
Grab the next digit (6) from the dividend, add it to 0, then carry on: 6 / 3

On to step 2:
When dividing 6 by 3, we get 2 with a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 22.0
If we subtract 6 from 6, we get 0.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 3

Step 3:
4 divided by 3 is 1 with a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 221.0
The remainder is 1 after subtracting 3 from 4.
Fetch the next digit (1) from the dividend, attach it to 1 and continue: 11 / 3

Moving on to step 4:
When dividing 11 by 3, we get 3 with a remainder of 2.
The next digit of our result is 3. 
Result so far: 2213.0
If we take 9 away from 11, we end up with 2.
Include the next digit (9) from the dividend after 2, then repeat: 29 / 3

Going ahead to step 5:
When dividing 29 by 3, we get 9 with a remainder of 2.
The number 9 becomes the next digit in our result. 
Result so far: 22139.0
Deduct 27 from 29 and we're left with 2.
Append the next digit (9) from the dividend to 2 and continue with: 29 / 3

Let's proceed to step 6:
3 goes into 29 9 times with a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 221399.0
If we take 27 away from 29, 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.

Step 7:
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: 221399.6
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:
3 can be fit into 20 6 times, resulting in a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 221399.66
If we subtract 18 from 20, we get 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 221399.66 and a remainder of 0.002.