We divide 2531584 by 3
The aim is to understand the frequency of 3 in 2531584.

Step 1:
3 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 3

Let's proceed to step 2:
When dividing 25 by 3, we get 8 with a remainder of 1.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we take 24 away from 25, we end up with 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 3

Moving on to step 3:
When dividing 13 by 3, we get 4 with a remainder of 1.
Record the quotient 4 as the next digit in the result. 
Result so far: 84.0
Subtract 12 from 13 to get 1.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 3

Advancing to step 4:
11 divided by 3 is 3 with a remainder of 2.
Write down 3 as next digit of the result. 
Result so far: 843.0
Subtracting 9 from 11 leaves us with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 3

Step 5:
25 divided by 3 is 8 with a remainder of 1.
Put 8 as the next digit of the answer. 
Result so far: 8438.0
Deduct 24 from 25 and we're left with 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 3

Step 6:
3 goes into 18 6 times with a remainder of 0.
The next digit of our result is 6. 
Result so far: 84386.0
Subtracting 18 from 18 leaves us with 0.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 3

Moving on to step 7:
3 can be fit into 4 1 times, resulting in a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 843861.0
If we take 3 away from 4, 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.

Advancing 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: 843861.3
Subtracting 9 from 10 leaves us 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.

Let's proceed to step 9:
3 goes into 10 3 times with a remainder of 1.
The next digit of our result is 3. 
Result so far: 843861.33
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.

The final result is 843861.33 with a remainder of 0.001.