639579 divided by 24 
The aim is to understand the frequency of 24 in 639579.

Moving on to step 1:
When dividing 6 by 24, we get 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 24

Step 2:
When dividing 63 by 24, we get 2 with a remainder of 15.
Put 2 as the next digit of the answer. 
Result so far: 2.0
The remainder is 15 after subtracting 48 from 63.
Fetch the next digit (9) from the dividend, attach it to 15 and continue: 159 / 24

On to step 3:
When dividing 159 by 24, we get 6 with a remainder of 15.
Use 6 as the next digit of our solution. 
Result so far: 26.0
Subtract 144 from 159 to get 15.
Bring next digit (5) of the dividend behind the 15 and repeat the process: 155 / 24

Advancing to step 4:
155 divided by 24 is 6 with a remainder of 11.
The number 6 becomes the next digit in our result. 
Result so far: 266.0
Deduct 144 from 155 and we're left with 11.
Grab the next digit (7) from the dividend, add it to 11, then carry on: 117 / 24

On to step 5:
When dividing 117 by 24, we get 4 with a remainder of 21.
The next digit of our result is 4. 
Result so far: 2664.0
Deduct 96 from 117 and we're left with 21.
Grab the next digit (9) from the dividend, add it to 21, then carry on: 219 / 24

Advancing to step 6:
24 goes into 219 9 times with a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 26649.0
If we subtract 216 from 219, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 7:
24 can be fit into 30 1 times, resulting in a remainder of 6.
Record the quotient 1 as the next digit in the result. 
Result so far: 26649.1
If we subtract 24 from 30, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 8:
When dividing 60 by 24, we get 2 with a remainder of 12.
Write down 2 as next digit of the result. 
Result so far: 26649.12
The remainder is 12 after subtracting 48 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 9:
If we divide 120 by 24, we get 5 and a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 26649.125
Subtracting 120 from 120 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.

Step 10:
When dividing 0 by 24, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 26649.125
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.

On to step 11:
When dividing 0 by 24, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 26649.125
If we take 0 away from 0, we end up 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.

Our division results in 26649.125 with a remaining 0.0.