We're dividing 661320 by 3 
The aim is to understand the frequency of 3 in 661320.

Advancing to step 1:
If we divide 6 by 3, we get 2 and a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we subtract 6 from 6, we get 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 3

Step 2:
If we divide 6 by 3, we get 2 and a remainder of 0.
The next digit of our result is 2. 
Result so far: 22.0
Deduct 6 from 6 and we're left with 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 3

Advancing to step 3:
3 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 220.0
Subtracting 0 from 1 leaves us with 1.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 3

Step 4:
13 divided by 3 is 4 with a remainder of 1.
Write down 4 as next digit of the result. 
Result so far: 2204.0
The remainder is 1 after subtracting 12 from 13.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 3

Advancing to step 5:
When dividing 12 by 3, we get 4 with a remainder of 0.
The next digit of our result is 4. 
Result so far: 22044.0
If we subtract 12 from 12, we get 0.
Include the next digit (0) from the dividend after 0, then repeat: 0 / 3

Advancing to step 6:
If we divide 0 by 3, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 220440.0
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.

Advancing to step 7:
3 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 220440.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
The number 3 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 220440.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 220440.0 and a remainder of 0.0.