We look at the division of 494938 by 3 
The aim is to understand the frequency of 3 in 494938.

Advancing to step 1:
4 divided by 3 is 1 with a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 1 after subtracting 3 from 4.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 3

Moving on to step 2:
3 goes into 19 6 times with a remainder of 1.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
Subtract 18 from 19 to get 1.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 3

On to step 3:
When dividing 14 by 3, we get 4 with a remainder of 2.
The next digit of our result is 4. 
Result so far: 164.0
Deduct 12 from 14 and we're left with 2.
Grab the next digit (9) from the dividend, add it to 2, then carry on: 29 / 3

Going ahead to step 4:
29 divided by 3 is 9 with a remainder of 2.
Put 9 as the next digit of the answer. 
Result so far: 1649.0
Subtracting 27 from 29 leaves us with 2.
Grab the next digit (3) from the dividend, add it to 2, then carry on: 23 / 3

Going ahead to step 5:
23 divided by 3 is 7 with a remainder of 2.
Write down 7 as next digit of the result. 
Result so far: 16497.0
Deduct 21 from 23 and we're left with 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 3

Let's proceed to step 6:
3 goes into 28 9 times with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 164979.0
If we subtract 27 from 28, we 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.

Let's proceed to step 7:
The number 3 fits into 10 3 times, leaving a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 164979.3
Deduct 9 from 10 and we're left 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.

Going ahead to step 8:
If we divide 10 by 3, we get 3 and a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 164979.33
If we subtract 9 from 10, we 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.

The final result is 164979.33 with a remainder of 0.001.