We look at the division of 237314 by 15 
The aim is to understand the frequency of 15 in 237314.

Moving on to step 1:
2 divided by 15 is 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Fetch the next digit (3) from the dividend, attach it to 2 and continue: 23 / 15

Moving on to step 2:
The number 15 fits into 23 1 times, leaving a remainder of 8.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 15 from 23 and we're left with 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 15

On to step 3:
The number 15 fits into 87 5 times, leaving a remainder of 12.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
If we take 75 away from 87, we end up with 12.
Grab the next digit (3) from the dividend, add it to 12, then carry on: 123 / 15

Advancing to step 4:
123 divided by 15 is 8 with a remainder of 3.
Use 8 as the next digit of our solution. 
Result so far: 158.0
Subtract 120 from 123 to get 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 15

Step 5:
31 divided by 15 is 2 with a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 1582.0
If we take 30 away from 31, we end up with 1.
Grab the next digit (4) from the dividend, add it to 1, then carry on: 14 / 15

On to step 6:
The number 15 fits into 14 0 times, leaving a remainder of 14.
Record the quotient 0 as the next digit in the result. 
Result so far: 15820.0
If we take 0 away from 14, 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.

On to step 7:
140 divided by 15 is 9 with a remainder of 5.
The number 9 becomes the next digit in our result. 
Result so far: 15820.9
Deduct 135 from 140 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.

On to step 8:
15 can be fit into 50 3 times, resulting in a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 15820.93
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.

Let's proceed to step 9:
The number 15 fits into 50 3 times, leaving a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 15820.933
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.

The final result is 15820.933 with a remainder of 0.0005.