285594 ÷ 15 
The aim is to understand the frequency of 15 in 285594.

Going ahead to step 1:
15 goes into 2 0 times with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 15

Let's proceed to step 2:
The number 15 fits into 28 1 times, leaving a remainder of 13.
The next digit of our result is 1. 
Result so far: 1.0
If we take 15 away from 28, we end up with 13.
Include the next digit (5) from the dividend after 13, then repeat: 135 / 15

Moving on to step 3:
15 goes into 135 9 times with a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
If we subtract 135 from 135, we get 0.
Bring next digit (5) of the dividend behind the 0 and repeat the process: 5 / 15

Moving on to step 4:
When dividing 5 by 15, we get 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 190.0
Subtract 0 from 5 to get 5.
Grab the next digit (9) from the dividend, add it to 5, then carry on: 59 / 15

Let's proceed to step 5:
If we divide 59 by 15, we get 3 and a remainder of 14.
Put 3 as the next digit of the answer. 
Result so far: 1903.0
Subtracting 45 from 59 leaves us with 14.
Take the next digit (4) from the dividend and append it to 14, then repeat: 144 / 15

Step 6:
When dividing 144 by 15, we get 9 with a remainder of 9.
Put 9 as the next digit of the answer. 
Result so far: 19039.0
Deduct 135 from 144 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 7:
If we divide 90 by 15, we get 6 and a remainder of 0.
The next digit of our result is 6. 
Result so far: 19039.6
Subtract 90 from 90 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.

Step 8:
If we divide 0 by 15, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 19039.6
If we subtract 0 from 0, we 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.

Step 9:
When dividing 0 by 15, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 19039.6
Deduct 0 from 0 and we're left 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.

The quotient of the division is 19039.6, and the remainder is 0.0.