We divide 777665 by 3
The aim is to understand the frequency of 3 in 777665.

On to step 1:
3 goes into 7 2 times with a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 6 from 7 and we're left with 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 3

On to step 2:
17 divided by 3 is 5 with a remainder of 2.
The number 5 becomes the next digit in our result. 
Result so far: 25.0
Subtracting 15 from 17 leaves us with 2.
Bring next digit (7) of the dividend behind the 2 and repeat the process: 27 / 3

Moving on to step 3:
If we divide 27 by 3, we get 9 and a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 259.0
Subtracting 27 from 27 leaves us with 0.
Take the next digit (6) from the dividend and append it to 0, then repeat: 6 / 3

On to step 4:
When dividing 6 by 3, we get 2 with a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 2592.0
Subtracting 6 from 6 leaves us with 0.
Take the next digit (6) from the dividend and append it to 0, then repeat: 6 / 3

Advancing to step 5:
3 can be fit into 6 2 times, resulting in a remainder of 0.
The next digit of our result is 2. 
Result so far: 25922.0
Deduct 6 from 6 and we're left with 0.
Bring next digit (5) of the dividend behind the 0 and repeat the process: 5 / 3

Step 6:
The number 3 fits into 5 1 times, leaving a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 259221.0
Deduct 3 from 5 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.

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: 259221.6
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.

Moving on to step 8:
20 divided by 3 is 6 with a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 259221.66
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.

After the division, we end up with 259221.66 and a remainder of 0.002.