978021 divided by 3 
The aim is to understand the frequency of 3 in 978021.

Let's proceed to step 1:
The number 3 fits into 9 3 times, leaving a remainder of 0.
The next digit of our result is 3. 
Result so far: 3.0
If we subtract 9 from 9, we get 0.
Append the next digit (7) from the dividend to 0 and continue with: 7 / 3

Advancing to step 2:
The number 3 fits into 7 2 times, leaving a remainder of 1.
The next digit of our result is 2. 
Result so far: 32.0
If we take 6 away from 7, we end up with 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 3

Let's proceed to step 3:
3 can be fit into 18 6 times, resulting in a remainder of 0.
Write down 6 as next digit of the result. 
Result so far: 326.0
Deduct 18 from 18 and we're left with 0.
Append the next digit (0) from the dividend to 0 and continue with: 0 / 3

Let's proceed to step 4:
If we divide 0 by 3, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 3260.0
The remainder is 0 after subtracting 0 from 0.
Append the next digit (2) from the dividend to 0 and continue with: 2 / 3

On to step 5:
If we divide 2 by 3, we get 0 and a remainder of 2.
The next digit of our result is 0. 
Result so far: 32600.0
If we take 0 away from 2, we end up with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 3

Moving on to step 6:
3 goes into 21 7 times with a remainder of 0.
Use 7 as the next digit of our solution. 
Result so far: 326007.0
Subtracting 21 from 21 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 7:
The number 3 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 326007.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
3 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 326007.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 326007.0, and the remainder is 0.0.