Let's divide 623548 by 3
The aim is to understand the frequency of 3 in 623548.

Going ahead to step 1:
The number 3 fits into 6 2 times, leaving a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 6 from 6, we get 0.
Fetch the next digit (2) from the dividend, attach it to 0 and continue: 2 / 3

Let's proceed to step 2:
If we divide 2 by 3, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (3) from the dividend, attach it to 2 and continue: 23 / 3

Going ahead to step 3:
3 can be fit into 23 7 times, resulting in a remainder of 2.
The number 7 becomes the next digit in our result. 
Result so far: 207.0
Deduct 21 from 23 and we're left with 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 3

On to step 4:
25 divided by 3 is 8 with a remainder of 1.
The number 8 becomes the next digit in our result. 
Result so far: 2078.0
If we take 24 away from 25, we end up with 1.
Include the next digit (4) from the dividend after 1, then repeat: 14 / 3

Step 5:
3 can be fit into 14 4 times, resulting in a remainder of 2.
The next digit of our result is 4. 
Result so far: 20784.0
If we subtract 12 from 14, we get 2.
Include the next digit (8) from the dividend after 2, then repeat: 28 / 3

Advancing to step 6:
28 divided by 3 is 9 with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 207849.0
The remainder is 1 after subtracting 27 from 28.
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 7:
10 divided by 3 is 3 with a remainder of 1.
The next digit of our result is 3. 
Result so far: 207849.3
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.

Advancing to step 8:
When dividing 10 by 3, we get 3 with a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 207849.33
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.

After the division, we end up with 207849.33 and a remainder of 0.001.