770291 ÷ 3 
The aim is to understand the frequency of 3 in 770291.

Let's proceed to step 1:
3 can be fit into 7 2 times, resulting in 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.
Grab the next digit (7) from the dividend, add it to 1, then carry on: 17 / 3

Let's proceed to step 2:
When dividing 17 by 3, we get 5 with a remainder of 2.
The number 5 becomes the next digit in our result. 
Result so far: 25.0
The remainder is 2 after subtracting 15 from 17.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 3

Advancing to step 3:
3 can be fit into 20 6 times, resulting in a remainder of 2.
The next digit of our result is 6. 
Result so far: 256.0
If we subtract 18 from 20, we get 2.
Grab the next digit (2) from the dividend, add it to 2, then carry on: 22 / 3

Let's proceed to step 4:
When dividing 22 by 3, we get 7 with a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 2567.0
If we take 21 away from 22, we end up with 1.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 3

On to step 5:
If we divide 19 by 3, we get 6 and a remainder of 1.
Use 6 as the next digit of our solution. 
Result so far: 25676.0
If we subtract 18 from 19, we get 1.
Include the next digit (1) from the dividend after 1, then repeat: 11 / 3

Moving on to step 6:
3 can be fit into 11 3 times, resulting in a remainder of 2.
The next digit of our result is 3. 
Result so far: 256763.0
Deduct 9 from 11 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.

Advancing to step 7:
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: 256763.6
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.

On 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: 256763.66
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.

The final result is 256763.66 with a remainder of 0.002.