588377 divided by 15 
The aim is to understand the frequency of 15 in 588377.

On to step 1:
The number 15 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Bring next digit (8) of the dividend behind the 5 and repeat the process: 58 / 15

Going ahead to step 2:
15 goes into 58 3 times with a remainder of 13.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 45 from 58 to get 13.
Fetch the next digit (8) from the dividend, attach it to 13 and continue: 138 / 15

Advancing to step 3:
When dividing 138 by 15, we get 9 with a remainder of 3.
The number 9 becomes the next digit in our result. 
Result so far: 39.0
Subtract 135 from 138 to get 3.
Take the next digit (3) from the dividend and append it to 3, then repeat: 33 / 15

Moving on to step 4:
If we divide 33 by 15, we get 2 and a remainder of 3.
The next digit of our result is 2. 
Result so far: 392.0
The remainder is 3 after subtracting 30 from 33.
Fetch the next digit (7) from the dividend, attach it to 3 and continue: 37 / 15

Moving on to step 5:
15 goes into 37 2 times with a remainder of 7.
Use 2 as the next digit of our solution. 
Result so far: 3922.0
Deduct 30 from 37 and we're left with 7.
Bring next digit (7) of the dividend behind the 7 and repeat the process: 77 / 15

Let's proceed to step 6:
15 goes into 77 5 times with a remainder of 2.
Put 5 as the next digit of the answer. 
Result so far: 39225.0
The remainder is 2 after subtracting 75 from 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 7:
15 can be fit into 20 1 times, resulting in a remainder of 5.
Write down 1 as next digit of the result. 
Result so far: 39225.1
Deduct 15 from 20 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.

Step 8:
50 divided by 15 is 3 with a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 39225.13
The remainder is 5 after subtracting 45 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 9:
15 can be fit into 50 3 times, resulting in a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 39225.133
Subtract 45 from 50 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.

After the division, we end up with 39225.133 and a remainder of 0.0005.