We're dividing 12579 by 45 
The aim is to understand the frequency of 45 in 12579.

Step 1:
45 goes into 1 0 times with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 45

Step 2:
If we divide 12 by 45, we get 0 and a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Bring next digit (5) of the dividend behind the 12 and repeat the process: 125 / 45

Let's proceed to step 3:
45 goes into 125 2 times with a remainder of 35.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 90 away from 125, we end up with 35.
Take the next digit (7) from the dividend and append it to 35, then repeat: 357 / 45

Let's proceed to step 4:
357 divided by 45 is 7 with a remainder of 42.
The number 7 becomes the next digit in our result. 
Result so far: 27.0
Subtracting 315 from 357 leaves us with 42.
Fetch the next digit (9) from the dividend, attach it to 42 and continue: 429 / 45

Going ahead to step 5:
45 can be fit into 429 9 times, resulting in a remainder of 24.
Write down 9 as next digit of the result. 
Result so far: 279.0
Subtracting 405 from 429 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 6:
When dividing 240 by 45, we get 5 with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 279.5
The remainder is 15 after subtracting 225 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 7:
45 goes into 150 3 times with a remainder of 15.
Put 3 as the next digit of the answer. 
Result so far: 279.53
Subtract 135 from 150 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 8:
45 goes into 150 3 times with a remainder of 15.
Use 3 as the next digit of our solution. 
Result so far: 279.533
If we take 135 away from 150, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The final result is 279.533 with a remainder of 0.0015.