We divide 58939 by 15
The aim is to understand the frequency of 15 in 58939.

On to step 1:
If we divide 5 by 15, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Bring next digit (8) of the dividend behind the 5 and repeat the process: 58 / 15

Advancing to step 2:
15 can be fit into 58 3 times, resulting in a remainder of 13.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we take 45 away from 58, we end up with 13.
Append the next digit (9) from the dividend to 13 and continue with: 139 / 15

Going ahead to step 3:
If we divide 139 by 15, we get 9 and a remainder of 4.
Write down 9 as next digit of the result. 
Result so far: 39.0
The remainder is 4 after subtracting 135 from 139.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 15

On to step 4:
43 divided by 15 is 2 with a remainder of 13.
Record the quotient 2 as the next digit in the result. 
Result so far: 392.0
Deduct 30 from 43 and we're left with 13.
Include the next digit (9) from the dividend after 13, then repeat: 139 / 15

Let's proceed to step 5:
139 divided by 15 is 9 with a remainder of 4.
The next digit of our result is 9. 
Result so far: 3929.0
If we subtract 135 from 139, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 6:
When dividing 40 by 15, we get 2 with a remainder of 10.
Write down 2 as next digit of the result. 
Result so far: 3929.2
Subtracting 30 from 40 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 7:
If we divide 100 by 15, we get 6 and a remainder of 10.
The next digit of our result is 6. 
Result so far: 3929.26
If we take 90 away from 100, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
100 divided by 15 is 6 with a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 3929.266
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final outcome is 3929.266, with a leftover of 0.001.