We look at the division of 964450 by 3 
The aim is to understand the frequency of 3 in 964450.

On to step 1:
9 divided by 3 is 3 with a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Deduct 9 from 9 and we're left with 0.
Include the next digit (6) from the dividend after 0, then repeat: 6 / 3

Moving on to step 2:
6 divided by 3 is 2 with a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 32.0
If we subtract 6 from 6, we get 0.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 3

On to step 3:
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: 321.0
Subtract 3 from 4 to get 1.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 3

On to step 4:
The number 3 fits into 14 4 times, leaving a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 3214.0
If we take 12 away from 14, we end up with 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 3

Let's proceed to step 5:
If we divide 25 by 3, we get 8 and a remainder of 1.
Put 8 as the next digit of the answer. 
Result so far: 32148.0
Subtracting 24 from 25 leaves us with 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 3

Step 6:
If we divide 10 by 3, we get 3 and a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 321483.0
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.

Moving on to step 7:
The number 3 fits into 10 3 times, leaving a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 321483.3
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.

On to step 8:
When dividing 10 by 3, we get 3 with a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 321483.33
If we take 9 away from 10, we end up 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 321483.33, and the remainder is 0.001.