783804 ÷ 3 
The aim is to understand the frequency of 3 in 783804.

Step 1:
When dividing 7 by 3, we get 2 with a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 6 from 7 leaves us with 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 3

Moving on to step 2:
18 divided by 3 is 6 with a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 26.0
The remainder is 0 after subtracting 18 from 18.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 3

On to step 3:
When dividing 3 by 3, we get 1 with a remainder of 0.
The next digit of our result is 1. 
Result so far: 261.0
Subtracting 3 from 3 leaves us with 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 3

Let's proceed to step 4:
3 goes into 8 2 times with a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 2612.0
Deduct 6 from 8 and we're left with 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 3

Going ahead to step 5:
20 divided by 3 is 6 with a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 26126.0
Subtract 18 from 20 to get 2.
Bring next digit (4) of the dividend behind the 2 and repeat the process: 24 / 3

Advancing to step 6:
3 goes into 24 8 times with a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 261268.0
Subtracting 24 from 24 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:
If we divide 0 by 3, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 261268.0
Subtract 0 from 0 to 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.

Advancing to step 8:
The number 3 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 261268.0
Subtract 0 from 0 to 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.

The quotient of the division is 261268.0, and the remainder is 0.0.