857636 divided by 3 
The aim is to understand the frequency of 3 in 857636.

Let's proceed to step 1:
The number 3 fits into 8 2 times, leaving a remainder of 2.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 6 from 8 and we're left with 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 3

Moving on to step 2:
If we divide 25 by 3, we get 8 and a remainder of 1.
Use 8 as the next digit of our solution. 
Result so far: 28.0
If we take 24 away from 25, we end up with 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 3

Advancing to step 3:
If we divide 17 by 3, we get 5 and a remainder of 2.
Use 5 as the next digit of our solution. 
Result so far: 285.0
If we subtract 15 from 17, we get 2.
Fetch the next digit (6) from the dividend, attach it to 2 and continue: 26 / 3

Let's proceed to step 4:
The number 3 fits into 26 8 times, leaving a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 2858.0
If we subtract 24 from 26, we get 2.
Fetch the next digit (3) from the dividend, attach it to 2 and continue: 23 / 3

Step 5:
When dividing 23 by 3, we get 7 with a remainder of 2.
Write down 7 as next digit of the result. 
Result so far: 28587.0
Subtracting 21 from 23 leaves us with 2.
Take the next digit (6) from the dividend and append it to 2, then repeat: 26 / 3

On to step 6:
3 can be fit into 26 8 times, resulting in a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 285878.0
If we subtract 24 from 26, 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.

Let's proceed to step 7:
3 can be fit into 20 6 times, resulting in a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 285878.6
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.

Step 8:
If we divide 20 by 3, we get 6 and a remainder of 2.
The next digit of our result is 6. 
Result so far: 285878.66
Subtracting 18 from 20 leaves us 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.

Our division results in 285878.66 with a remaining 0.002.