We divide 185261 by 15
The aim is to understand the frequency of 15 in 185261.

On to step 1:
15 goes into 1 0 times with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 15

Going ahead to step 2:
15 can be fit into 18 1 times, resulting in a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 15 from 18, we get 3.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 15

On to step 3:
If we divide 35 by 15, we get 2 and a remainder of 5.
The next digit of our result is 2. 
Result so far: 12.0
Subtract 30 from 35 to get 5.
Take the next digit (2) from the dividend and append it to 5, then repeat: 52 / 15

Going ahead to step 4:
When dividing 52 by 15, we get 3 with a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 123.0
Deduct 45 from 52 and we're left with 7.
Bring next digit (6) of the dividend behind the 7 and repeat the process: 76 / 15

Advancing to step 5:
If we divide 76 by 15, we get 5 and a remainder of 1.
The number 5 becomes the next digit in our result. 
Result so far: 1235.0
If we subtract 75 from 76, we get 1.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 15

Step 6:
When dividing 11 by 15, we get 0 with a remainder of 11.
Use 0 as the next digit of our solution. 
Result so far: 12350.0
If we take 0 away from 11, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 7:
110 divided by 15 is 7 with a remainder of 5.
Put 7 as the next digit of the answer. 
Result so far: 12350.7
If we subtract 105 from 110, we 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.

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: 12350.73
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.

Going ahead to step 9:
50 divided by 15 is 3 with a remainder of 5.
The next digit of our result is 3. 
Result so far: 12350.733
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.

After the division, we end up with 12350.733 and a remainder of 0.0005.