We're dividing 665749 by 3 
The aim is to understand the frequency of 3 in 665749.

Moving on to step 1:
If we divide 6 by 3, we get 2 and a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 6 away from 6, we end up with 0.
Include the next digit (6) from the dividend after 0, then repeat: 6 / 3

Moving on to step 2:
3 goes into 6 2 times with a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 22.0
The remainder is 0 after subtracting 6 from 6.
Fetch the next digit (5) from the dividend, attach it to 0 and continue: 5 / 3

Going ahead to step 3:
When dividing 5 by 3, we get 1 with a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 221.0
The remainder is 2 after subtracting 3 from 5.
Fetch the next digit (7) from the dividend, attach it to 2 and continue: 27 / 3

Let's proceed to step 4:
3 goes into 27 9 times with a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 2219.0
The remainder is 0 after subtracting 27 from 27.
Fetch the next digit (4) from the dividend, attach it to 0 and continue: 4 / 3

Going ahead to step 5:
The number 3 fits into 4 1 times, leaving a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 22191.0
If we subtract 3 from 4, we get 1.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 3

Moving on to step 6:
3 goes into 19 6 times with a remainder of 1.
Put 6 as the next digit of the answer. 
Result so far: 221916.0
Subtract 18 from 19 to 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:
If we divide 10 by 3, we get 3 and a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 221916.3
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.

Step 8:
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: 221916.33
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.

The final result is 221916.33 with a remainder of 0.001.