258293 divided by 12 
The aim is to understand the frequency of 12 in 258293.

Let's proceed to step 1:
When dividing 2 by 12, we get 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 12

On to step 2:
25 divided by 12 is 2 with a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 24 from 25 and we're left with 1.
Append the next digit (8) from the dividend to 1 and continue with: 18 / 12

Advancing to step 3:
12 goes into 18 1 times with a remainder of 6.
Use 1 as the next digit of our solution. 
Result so far: 21.0
Deduct 12 from 18 and we're left with 6.
Append the next digit (2) from the dividend to 6 and continue with: 62 / 12

Moving on to step 4:
62 divided by 12 is 5 with a remainder of 2.
Write down 5 as next digit of the result. 
Result so far: 215.0
If we subtract 60 from 62, we get 2.
Append the next digit (9) from the dividend to 2 and continue with: 29 / 12

Moving on to step 5:
If we divide 29 by 12, we get 2 and a remainder of 5.
Put 2 as the next digit of the answer. 
Result so far: 2152.0
Subtract 24 from 29 to get 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 12

On to step 6:
12 goes into 53 4 times with a remainder of 5.
The number 4 becomes the next digit in our result. 
Result so far: 21524.0
Subtract 48 from 53 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 7:
When dividing 50 by 12, we get 4 with a remainder of 2.
The next digit of our result is 4. 
Result so far: 21524.4
The remainder is 2 after subtracting 48 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 8:
20 divided by 12 is 1 with a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 21524.41
Subtract 12 from 20 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 9:
80 divided by 12 is 6 with a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 21524.416
If we take 72 away from 80, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 10:
12 can be fit into 80 6 times, resulting in a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 21524.4166
Deduct 72 from 80 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final outcome is 21524.4166, with a leftover of 8e-05.