Let's divide 256913 by 3
The aim is to understand the frequency of 3 in 256913.

Let's proceed to step 1:
2 divided by 3 is 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 3

Let's proceed to step 2:
3 can be fit into 25 8 times, resulting in a remainder of 1.
Write down 8 as next digit of the result. 
Result so far: 8.0
The remainder is 1 after subtracting 24 from 25.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 3

Moving on to step 3:
The number 3 fits into 16 5 times, leaving a remainder of 1.
The number 5 becomes the next digit in our result. 
Result so far: 85.0
Subtracting 15 from 16 leaves us with 1.
Append the next digit (9) from the dividend to 1 and continue with: 19 / 3

Let's proceed to step 4:
3 goes into 19 6 times with a remainder of 1.
Put 6 as the next digit of the answer. 
Result so far: 856.0
Subtract 18 from 19 to get 1.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 3

Let's proceed to step 5:
11 divided by 3 is 3 with a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 8563.0
Subtracting 9 from 11 leaves us with 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 3

Going ahead to step 6:
3 goes into 23 7 times with a remainder of 2.
The number 7 becomes the next digit in our result. 
Result so far: 85637.0
Subtract 21 from 23 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.

Going ahead to step 7:
The number 3 fits into 20 6 times, leaving a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 85637.6
The remainder is 2 after subtracting 18 from 20.
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:
The number 3 fits into 20 6 times, leaving a remainder of 2.
The next digit of our result is 6. 
Result so far: 85637.66
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.

The final outcome is 85637.66, with a leftover of 0.002.