278287 ÷ 3 
The aim is to understand the frequency of 3 in 278287.

Step 1:
3 can be fit into 2 0 times, resulting in a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (7) of the dividend behind the 2 and repeat the process: 27 / 3

Going ahead to step 2:
3 goes into 27 9 times with a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
The remainder is 0 after subtracting 27 from 27.
Take the next digit (8) from the dividend and append it to 0, then repeat: 8 / 3

Moving on to step 3:
3 can be fit into 8 2 times, resulting in a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 92.0
The remainder is 2 after subtracting 6 from 8.
Grab the next digit (2) from the dividend, add it to 2, then carry on: 22 / 3

Moving on to step 4:
If we divide 22 by 3, we get 7 and a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 927.0
If we take 21 away from 22, we end up with 1.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 3

Step 5:
3 goes into 18 6 times with a remainder of 0.
The next digit of our result is 6. 
Result so far: 9276.0
Deduct 18 from 18 and we're left with 0.
Take the next digit (7) from the dividend and append it to 0, then repeat: 7 / 3

Advancing to step 6:
When dividing 7 by 3, we get 2 with a remainder of 1.
Record the quotient 2 as the next digit in the result. 
Result so far: 92762.0
Subtract 6 from 7 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.

Advancing to step 7:
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: 92762.3
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.

Let's proceed to step 8:
The number 3 fits into 10 3 times, leaving a remainder of 1.
The next digit of our result is 3. 
Result so far: 92762.33
If we take 9 away from 10, we end up 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.

Our division results in 92762.33 with a remaining 0.001.