We look at the division of 113639 by 3 
The aim is to understand the frequency of 3 in 113639.

Moving on to step 1:
The number 3 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 3

On to step 2:
If we divide 11 by 3, we get 3 and a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 9 from 11, we get 2.
Take the next digit (3) from the dividend and append it to 2, then repeat: 23 / 3

On to step 3:
3 can be fit into 23 7 times, resulting in a remainder of 2.
Write down 7 as next digit of the result. 
Result so far: 37.0
Subtracting 21 from 23 leaves us with 2.
Fetch the next digit (6) from the dividend, attach it to 2 and continue: 26 / 3

Step 4:
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: 378.0
If we take 24 away from 26, we end up with 2.
Fetch the next digit (3) from the dividend, attach it to 2 and continue: 23 / 3

Advancing to step 5:
23 divided by 3 is 7 with a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 3787.0
Subtract 21 from 23 to get 2.
Bring next digit (9) of the dividend behind the 2 and repeat the process: 29 / 3

Moving on to step 6:
The number 3 fits into 29 9 times, leaving a remainder of 2.
The next digit of our result is 9. 
Result so far: 37879.0
Subtract 27 from 29 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:
When dividing 20 by 3, we get 6 with a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 37879.6
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.

Let's proceed to step 8:
If we divide 20 by 3, we get 6 and a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 37879.66
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 result is 37879.66 with a remainder of 0.002.