We divide 628890 by 3
The aim is to understand the frequency of 3 in 628890.

Going ahead to step 1:
3 goes into 6 2 times with a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 6 from 6 to get 0.
Take the next digit (2) from the dividend and append it to 0, then repeat: 2 / 3

On to step 2:
When dividing 2 by 3, we get 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 20.0
Subtract 0 from 2 to get 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 3

Step 3:
When dividing 28 by 3, we get 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 209.0
Subtracting 27 from 28 leaves us with 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 3

On to step 4:
3 can be fit into 18 6 times, resulting in a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 2096.0
The remainder is 0 after subtracting 18 from 18.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 3

Step 5:
If we divide 9 by 3, we get 3 and a remainder of 0.
Put 3 as the next digit of the answer. 
Result so far: 20963.0
If we subtract 9 from 9, we get 0.
Include the next digit (0) from the dividend after 0, then repeat: 0 / 3

Let's proceed to step 6:
3 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 209630.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 7:
The number 3 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 209630.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
When dividing 0 by 3, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 209630.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 209630.0 with a remaining 0.0.