We look at the division of 749980 by 3 
The aim is to understand the frequency of 3 in 749980.

Moving on to step 1:
When dividing 7 by 3, we get 2 with a remainder of 1.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 6 from 7 to get 1.
Append the next digit (4) from the dividend to 1 and continue with: 14 / 3

Moving on to step 2:
3 goes into 14 4 times with a remainder of 2.
The next digit of our result is 4. 
Result so far: 24.0
The remainder is 2 after subtracting 12 from 14.
Take the next digit (9) from the dividend and append it to 2, then repeat: 29 / 3

Moving on to step 3:
29 divided by 3 is 9 with a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 249.0
If we subtract 27 from 29, we get 2.
Append the next digit (9) from the dividend to 2 and continue with: 29 / 3

Going ahead to step 4:
3 can be fit into 29 9 times, resulting in a remainder of 2.
Record the quotient 9 as the next digit in the result. 
Result so far: 2499.0
If we subtract 27 from 29, we get 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 3

On to step 5:
The number 3 fits into 28 9 times, leaving a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 24999.0
If we subtract 27 from 28, we get 1.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 3

Moving on to step 6:
The number 3 fits into 10 3 times, leaving a remainder of 1.
The next digit of our result is 3. 
Result so far: 249993.0
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.

Step 7:
When dividing 10 by 3, we get 3 with a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 249993.3
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.

Going ahead to step 8:
10 divided by 3 is 3 with a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 249993.33
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.

Our division results in 249993.33 with a remaining 0.001.