290426 divided by 3 
The aim is to understand the frequency of 3 in 290426.

Step 1:
3 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (9) from the dividend, attach it to 2 and continue: 29 / 3

Let's proceed to step 2:
29 divided by 3 is 9 with a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 9.0
If we take 27 away from 29, we end up with 2.
Bring next digit (0) of the dividend behind the 2 and repeat the process: 20 / 3

Moving on to step 3:
The number 3 fits into 20 6 times, leaving a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 96.0
Subtract 18 from 20 to get 2.
Fetch the next digit (4) from the dividend, attach it to 2 and continue: 24 / 3

Going ahead to step 4:
When dividing 24 by 3, we get 8 with a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 968.0
The remainder is 0 after subtracting 24 from 24.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 3

Going ahead to step 5:
The number 3 fits into 2 0 times, leaving a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 9680.0
The remainder is 2 after subtracting 0 from 2.
Grab the next digit (6) from the dividend, add it to 2, then carry on: 26 / 3

Moving on to step 6:
The number 3 fits into 26 8 times, leaving a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 96808.0
Deduct 24 from 26 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.

On to step 7:
The number 3 fits into 20 6 times, leaving a remainder of 2.
The next digit of our result is 6. 
Result so far: 96808.6
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.

On to step 8:
20 divided by 3 is 6 with a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 96808.66
Subtract 18 from 20 to 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.

The final result is 96808.66 with a remainder of 0.002.