We look at the division of 572594 by 15 
The aim is to understand the frequency of 15 in 572594.

Going ahead to step 1:
When dividing 5 by 15, we get 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Grab the next digit (7) from the dividend, add it to 5, then carry on: 57 / 15

Let's proceed to step 2:
57 divided by 15 is 3 with a remainder of 12.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
The remainder is 12 after subtracting 45 from 57.
Grab the next digit (2) from the dividend, add it to 12, then carry on: 122 / 15

Going ahead to step 3:
15 can be fit into 122 8 times, resulting in a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 38.0
If we subtract 120 from 122, we get 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 15

Step 4:
If we divide 25 by 15, we get 1 and a remainder of 10.
The next digit of our result is 1. 
Result so far: 381.0
If we take 15 away from 25, we end up with 10.
Grab the next digit (9) from the dividend, add it to 10, then carry on: 109 / 15

Step 5:
The number 15 fits into 109 7 times, leaving a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 3817.0
Deduct 105 from 109 and we're left with 4.
Grab the next digit (4) from the dividend, add it to 4, then carry on: 44 / 15

Going ahead to step 6:
If we divide 44 by 15, we get 2 and a remainder of 14.
Use 2 as the next digit of our solution. 
Result so far: 38172.0
If we take 30 away from 44, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 7:
15 goes into 140 9 times with a remainder of 5.
Record the quotient 9 as the next digit in the result. 
Result so far: 38172.9
Subtracting 135 from 140 leaves us with 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 8:
15 goes into 50 3 times with a remainder of 5.
The next digit of our result is 3. 
Result so far: 38172.93
If we take 45 away from 50, we end up with 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 9:
When dividing 50 by 15, we get 3 with a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 38172.933
Deduct 45 from 50 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The quotient of the division is 38172.933, and the remainder is 0.0005.