We're dividing 248722 by 3 
The aim is to understand the frequency of 3 in 248722.

Going ahead to step 1:
When dividing 2 by 3, we get 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Grab the next digit (4) from the dividend, add it to 2, then carry on: 24 / 3

On to step 2:
3 can be fit into 24 8 times, resulting in a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 8.0
The remainder is 0 after subtracting 24 from 24.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 3

On to step 3:
3 can be fit into 8 2 times, resulting in a remainder of 2.
Use 2 as the next digit of our solution. 
Result so far: 82.0
Subtracting 6 from 8 leaves us with 2.
Grab the next digit (7) from the dividend, add it to 2, then carry on: 27 / 3

Moving on to step 4:
When dividing 27 by 3, we get 9 with a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 829.0
Deduct 27 from 27 and we're left with 0.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 3

Advancing to step 5:
3 goes into 2 0 times with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 8290.0
Deduct 0 from 2 and we're left with 2.
Grab the next digit (2) from the dividend, add it to 2, then carry on: 22 / 3

Advancing to step 6:
The number 3 fits into 22 7 times, leaving a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 82907.0
If we take 21 away from 22, 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.

Going ahead to step 7:
If we divide 10 by 3, we get 3 and a remainder of 1.
The next digit of our result is 3. 
Result so far: 82907.3
If we subtract 9 from 10, we 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.

On to step 8:
3 can be fit into 10 3 times, resulting in a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 82907.33
The remainder is 1 after subtracting 9 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The quotient of the division is 82907.33, and the remainder is 0.001.